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19 tháng 2 2018

13. We are very interested in the problem . It has been discussed in class .
the problem which we are very interested in has been discussed in class .
14. Lung cancer is very dangerous . Million of people died of it .
Lung cancer of which million of people died is very dangerous
15. I like standing at the window . I can see the park from the window .
I like standing at the window from which I can see the park
16. The woman lives next door to me . You gave place to her on the bus .
The woman to whom you gave place on the bus lives next door to me
17. The examination lasted 2 days . I was successful in this exams .
The examination in which i was successful lasted 2 days
18. This is the result of our work . I'm pleased with it .
This is the result of our work with which I'm pleased
19. Mr Brown is the man . I'm responsible to him for my work
Mr Brown is the man to whom I'm responsible for my work .

20. This snake is dangerous . I'm afraid of it .
This snake of which i am afraid is dangerous
21. There are a number of factors . We have no control over them .
There are a number of factors over which we have no control
22. The picture was beautiful . She was looking at it .
The picture at which she was looking was beautiful
23. That's the woman . John used to be married to her .
That's the woman to whom John used to be married
24. My sister has 2 daughters . I often have to look after them
My sister has 2 daughters whom I often have to look after
25 . This is the book . I'm looking for it.
This is the book which I'm looking for
26. The boy fell in love with the girl . She left him after a few weeks .
The girl with whom the boy fell in love left him after a few weeks.

a. Are the bold italic nouns in the sentences countable or uncountable? Write C or U next to them 1. Are these oranges for you? Yes, I love eating fruit. 2. Where can I put my luggage? - Leave it on the shelf here. 3. My hair is getting very long. I need to get it cut. 4. There is a lot of information you can get from him. 5. Malcolm is looking for a new job. He's been out of work for four months. 6. He never has enough money at the end of the month. 7. I am going to buy a lot of new...
Đọc tiếp

a. Are the bold italic nouns in the sentences countable or uncountable? Write C or U next to them

1. Are these oranges for you? Yes, I love eating fruit.

2. Where can I put my luggage? - Leave it on the shelf here.

3. My hair is getting very long. I need to get it cut.

4. There is a lot of information you can get from him.

5. Malcolm is looking for a new job. He's been out of work for four months.

6. He never has enough money at the end of the month.

7. I am going to buy a lot of new furniture for my new house.

8. Oh no! There is a hair in my tomato soup!

9. I've had too many cups of coffee today. I'll have some fruit juice now.

10. The day was wet and dark in the morning but later we had lovely weather.

11. Careful! There's broken glass on the floor. I've just dropped my glass by accident.

12. He caught a big fish at the lake. His wife will cook it with vegetables.

13. I was in a hurry this morning. I didn't have time for breakfast.

14. I had some interesting experiences while I was in Africa.

15. If you want to know the news you can read the paper.

0
Combine the following pairs or groups of sentences by means of relative pronouns, making any changes necessary. 1 You sent me a present. Thank you very much for it. (Thank you very much/or...) 2 She was dancing with a student. He had a slight limp. (two ways) 3 I am looking after some children. They are terribly spoilt, (two ways) 4 The bed has no mattress. I sleep on this bed. (The bed 1. . .) 5 Romeo and Juliet were lovers. Their parents hated each other. 6 There wasn't any directory...
Đọc tiếp
Combine the following pairs or groups of sentences by means of relative pronouns, making any changes necessary. 1 You sent me a present. Thank you very much for it. (Thank you very much/or...) 2 She was dancing with a student. He had a slight limp. (two ways) 3 I am looking after some children. They are terribly spoilt, (two ways) 4 The bed has no mattress. I sleep on this bed. (The bed 1. . .) 5 Romeo and Juliet were lovers. Their parents hated each other. 6 There wasn't any directory in the telephone box. I was phoning from this box. 7 This is Mrs Jones. Her son won the championship last year. 8 I was sitting in a chair. It suddenly collapsed. (The chair . . .) 9 Mr Smith said he was too busy to speak to me. I had come specially to see him. 10 The man was sitting at the desk. I had come to see this man. 11 I missed the train. I usually catch this train. And I had to travel on the next. This was a slow train. (Make into one sentence.) 12 His girl friend turned out to be an enemy spy. He trusted her absolutely. 13 The car had bad brakes. We were in this car. And The man didn't know the way. This man was driving. (Make into one sentence.) 14 This is the story of a man. His wife suddenly loses her memory. 15 We'll have to get across the frontier. This will be difficult. 16 A man brought in a small girl. Her hand had been cut by flying glass. 17 The car crashed into a queue of people. Four of them were killed. 18 The roads were crowded with refugees. Many of them were wounded. 19 I was waiting for a man. He didn't turn up. (The man. . .) 20 Tom came to the party in patched jeans. This surprised the other guests. Most of the other guests were wearing evening dress. 21 The firm is sending me to York. I work for this firm. (The firm. . .) 22 The Smiths were given rooms in the hotel. Their house had been destroyed in the explosion. 23 I saw several houses. Most of them were quite unsuitable. 24 He wanted to come at 2 a.m. This didn't suit me at all. 25 This is a story of a group of boys. Their plane crashed on an uninhabited island. 26 They tie up parcels with string. This is so weak that the parcel usually comes to pieces before you get it home. (The string . ..) 27 He introduced me to his students. Most of them were from abroad. 28 He expected me to pay £2 for 12 eggs. Four of the eggs were broken. 29 He spoke in French. But the people didn't know French. He was speaking to these people. (Combine these last two sentences only.) 30 The boy was a philosophy student and wanted to sit up half the night discussing philosophy. Peter shared a flat with this boy. (two ways)
1
26 tháng 7 2018

1 You sent me a present. Thank you very much for it. (Thank you very much/or...)

Thank you very much for present which you sent me

2 She was dancing with a student. He had a slight limp. (two ways)

She was dancing with a student who had a slight limp.

3 I am looking after some children. They are terribly spoilt, (two ways)

I am looking after some children who are terribly spoilt

4 The bed has no mattress. I sleep on this bed. (The bed 1. . .)

The bad, which i sleep on, has no matter.

5 Romeo and Juliet were lovers. Their parents hated each other.

Romeo and Juliet, whose parents hated each other , were lovers.

6 There wasn't any directory in the telephone box. I was phoning from this box.

I was phoning from the bọx which was no drecting in.

7 This is Mrs Jones. Her son won the championship last year.

This is Mrs Jones whose son won the championship last year.

8 I was sitting in a chair. It suddenly collapsed. (The chair . . .)

I was sitting in a chair which suddenly collapsed.

9 Mr Smith said he was too busy to speak to me. I had come specially to see him.

I had comespecially to see Mr. Smith, who was too busy to speak to me.

10 The man was sitting at the desk. I had come to see this man.

The man, whom I had come to see, was sitting at the desk.

11 I missed the train. I usually catch this train. And I had to travel on the next. This was a slow train. (Make into one sentence.)

I missed the train, which I usually catch. And I had to travel on the next train which was very slow.

12 His girl friend turned out to be an enemy spy. He trusted her absolutely.

His girl friend whom he trusted absolutely turned out to be enemy spy.

13 The car had bad brakes. We were in this car. And The man didn't know the way. This man was driving. (Make into one sentence.)

We were in this car which had had brakes and the man who was driving didn't know the way.

14 This is the story of a man. His wife suddenly loses her memory.

This is the story of a man whose wife suddenly loses her memory

15 We'll have to get across the frontier. This will be difficult.

We'll have to get across the frontier, which will be difficult

16 A man brought in a small girl. Her hand had been cut by flying glass.

A man brought in a small girl whose hand had been cut by flying glass

17 The car crashed into a queue of people. Four of them were killed.

The car crashed into a queue of people, four of whom were killed

18 The roads were crowded with refugees. Many of them were wounded.

The roads were crowded with refugees, many of whom were wounded

19 I was waiting for a man. He didn't turn up. (The man. . .)

The man for whom i was waiting didn't turn up

20 Tom came to the party in patched jeans. This surprised the other guests. Most of the other guests were wearing evening dress.

Tom came to the party in patched jeans, which surprised the other guests, most of whom were wearing evening dress

21 The firm is sending me to York. I work for this firm. (The firm. . .)

The firm which i work for is sending me to York

22 The Smiths were given rooms in the hotel. Their house had been destroyed in the explosion.

The Smiths, whose house had been destroyed in the explosion, were given room in the hotel.

23 I saw several houses. Most of them were quite unsuitable.

I saw several houses, most of which were quite unsuitable.

24 He wanted to come at 2 a.m. This didn't suit me at all.

He wanted to come at 2 a.m, which didn’t suit me at all.

25 This is a story of a group of boys. Their plane crashed on an uninhabited island.

This is a story a group of boys whose plane crashed on a uninhabited island.

26 tháng 7 2018

Đội ơn bn!!!

Fill up the spaces in each of the following sentences by inserting a verb + up, or a verb + up + preposition combination. 1. It is ...... factory owners to provide fire-fighting equip­ment in their factories. (No verb is required here.) 2. Unfortunately he was ...... by his parents to believe that money was the only thing that mattered. 3. The party didn't ...... till 3 a.m. and the guests left very noisily. 4. I ran after him and soon ......... him. Then we went on together. 5. Mother to...
Đọc tiếp

Fill up the spaces in each of the following sentences by inserting a verb + up, or a verb + up + preposition combination.

1. It is ...... factory owners to provide fire-fighting equip­ment in their factories. (No verb is required here.) 2. Unfortunately he was ...... by his parents to believe that money was the only thing that mattered. 3. The party didn't ...... till 3 a.m. and the guests left very noisily.

4. I ran after him and soon ......... him. Then we went on together. 5. Mother to child: "Your clothes are covered with mud; what have you .........?" 6. If you buy the paint I'll ......this room for you. 7. He ......a list of conditions and we all agreed to them. 8. If you want a new passport you must ...... this form. 9. He......at 8 a.m. and went to bed at 11 p.m. 10. I tried three times to start the car and then ... it ... and went by bus. 11. If I ...... alcohol I'd be much healthier, but life wouldn't be so much fun. 12. I saw a policeman so I ......... him and asked him the way.

13. Most girls expect to get married when they....... 14. Cashiers carrying money to the bank are sometimes ...... by gunmen. 15. He couldn't ......... me as I ran much faster than he did

and soon left him behind. 16. I ...... a 20p piece that I saw lying on the ground. 17. He wasted two weeks and tried to ......... it by working madly the last day. 18. She said that she was going to educate her children her­self, for if they went to school they'd only......bad habits. 19. Before you go on holiday you should ...... the house and ask the police to keep an eye on it. 20. The car......suddenly with screaming brakes. 21. English people have to.........English weather. 22. The thieves ...... (bound) the housekeeper and ransacked the house. 23. I've stupidly ...... your books and mine and now I don't know which is which. 24. He is a dangerous criminal. He ought to be....... 25. I want to ... him ... . Would you please ...... his telephone number? 26. I ...... at the meeting-place but the others didn't come. 27. He wanted something to do in his spare time so he ...... carpentry. 28. The police......a notice saying, "No Parking". 29. "Tell me at the end of the week how many hours you have worked and I'll ......with you then", his employer said. 30. It's probably true. No one would......such a stupid story. 31. She sat down in front of the mirror and began to ...... her face. 32. If only we had a dish-washer, we wouldn't need to ...... after every meal. 33 My father said it was all my fault but my mother ......... (defended) me and said that it wasn't. 34 He ...... his speech by calling for a vote of thanks for last year's president.

0
Complete the sentences with the correct form of the word. 1. Good........................... can help people get rid of poverty. (educate) 2. Are there any youth................................ in your country? (organize) 3. These plants can grow...................................... in poor soils. (nature) 4. The teacher asked the students to choose a partner for the next...................................................................... (act) 5. “When it...
Đọc tiếp

Complete the sentences with the correct form of the word.

1. Good........................... can help people get rid of poverty. (educate)

2. Are there any youth................................ in your country? (organize)

3. These plants can grow...................................... in poor soils. (nature)

4. The teacher asked the students to choose a

partner for the next...................................................................... (act)

5. “When it the.......................................... in this school?” “It’s the first

week of August”. (enroll)

6. “Who is your favorite.................. , Lan?” “I think it’s Tom Hank”. (act)

7. If you want to be a member of the club, please fill out this................

form. (apply)

8. Are the scouting programs ................................................. from one

another in each country? (differ)

9. There is some................... in the waw the two groups work. (similar)

10. Are these both single-sex and .............................................. school

in your sountry? (educate)

11. The festival was well-............................................. ; everybody was

pleased with it. (organize)

12. Boys and girls may act................................. in this situation. (differ)

13. Scouting.................................................. in England in 1907. (begin)

14. I like these summer activities. I..................... for them now. (enroll)

13. The weather is very nice today. What about....................................

for walk in the park? (go)

14. Miss Linh asked me....................................... her after class. (meet)

15. He got bad marks in the test because he did no.......... at all. (revise)

16. The................................................... of English words cause a lot of

difficulties for the learners. (pronounce)

17. The Boy Scout is a youth.................................. that builds character

and encourages good citizenship and personal fitness. (Organize)

18. You must send your............ before Friday or it’ll be too late. (apply)

1
23 tháng 3 2017

1. Good.............education............. can help people get rid of poverty. (educate)

2. Are there any youth..............organizations.................. in your country? (organize)

3. These plants can grow...............naturally....................... in poor soils. (nature)

4. The teacher asked the students to choose a

partner for the next..............acting........................................................ (act)

5. “When it the..................enrollment........................ in this school?” “It’s the first

week of August”. (enroll)

6. “Who is your favorite.........artist......... , Lan?” “I think it’s Tom Hank”. (act)

7. If you want to be a member of the club, please fill out this......application..........

form. (apply)

8. Are the scouting programs ......................different........................... from one

another in each country? (differ)

9. There is some...........similarity........ in the waw the two groups work. (similar)

10. Are these both single-sex and .....................education......................... school

in your sountry? (educate)

11. The festival was well-...................organized.......................... ; everybody was

pleased with it. (organize)

12. Boys and girls may act..................differently............... in this situation. (differ)

13. Scouting...................began............................... in England in 1907. (begin)

14. I like these summer activities. I..........am enrolling........... for them now. (enroll)

13. The weather is very nice today. What about................going....................

for walk in the park? (go)

14. Miss Linh asked me..................to meet..................... her after class. (meet)

15. He got bad marks in the test because he did no....revision...... at all. (revise)

16. The....................pronunciation............................... of English words cause a lot of

difficulties for the learners. (pronounce)

17. The Boy Scout is a youth...............organiziation................... that builds character

and encourages good citizenship and personal fitness. (Organize)

18. You must send your.......application..... before Friday or it’ll be too late. (apply)

12 tháng 1 2018

good

6 tháng 3 2018

1.The thing i hate most about him is his(selfish) selfishness

2.There is a(use) useless railway line,there haven't been any train there for 10 years

3.If you want to(society) socialize ,you mustn't be shy

4.Peter's(eye) eyesight got worse

5.He enjoyed(social) socializing with friends and it cost nothing

6.Many rural areas in Vn have been (urban) urbanized

7.A(able) disabled child can hardly feed hisself

8.the evening was(enjoy) enjoyable spent playing cards and talking

9.The factory(put) output has increase considerable

10."where is the(enter) entrance to his shopping center

11."Look after your mother",were his(die) death words

12.Julia is really a very(art) artful kind of person

13.they celebrate their(depend) independence on 4th July

14.He was unhappy beacuse of his(deaf) deafness

15.Tom's (shy) shyness makes his social life difficult

16.He was very(set) upset when his card run over

17.Our teacher always(courage) encourages us to work hard

6 tháng 3 2018

laflafm câu còn lại cho tớ luôn nha đc ko?

You’d better put pressure ____ the wound and hold it tight. (on/ in/ to/ for) 3. Will you come ____ to my house on the weekend, Nam? (on/ in/ out/ over) 4. Nga came ____ of the hospital on Monday morning with good health. (on/ in/ out/ over) 5. The Ngo Si Lien Lane is ____ Quang Trung street and Tran Hung Dao street. (near/ between/ beside/ on) 6. You should cool the burn at once so as to ____ tissue damage. (ease/ relieve/ minimize/ maximize) 7. People use first-aid ____ ease the...
Đọc tiếp

You’d better put pressure ____ the wound and hold it tight. (on/ in/ to/ for)

3. Will you come ____ to my house on the weekend, Nam? (on/ in/ out/ over)

4. Nga came ____ of the hospital on Monday morning with good health. (on/ in/ out/ over)

5. The Ngo Si Lien Lane is ____ Quang Trung street and Tran Hung Dao street. (near/

between/ beside/ on)

6. You should cool the burn at once so as to ____ tissue damage. (ease/ relieve/ minimize/

maximize)

7. People use first-aid ____ ease the victim’s pain and anxiety. (so that/ in order to/ so as not

to/ in order that)

8. My parents promise they ____ back in about half an hour. (is/ be/ have be/ will be)

9. ____ I do the washing-up? - No, thanks. I can do it myself. (Will/ Would/ Shall/ Won’t)

10. Describing the ____ of the injured person is very important. (condition/ instruction/

advice/ distance)

11. ____ is a type of bed used for carrying the sick or injured people. (stretcher/ ambulance/

bandage/ crutch)

12. I forgot thanking them ____ helping me. (about/ for/ of/ on)

13. She has been ____ for days after the accident. (conscious/ inconscious/ consciously/

unconsciously)

14. Scale is an instrument for showing ____ people or things are. (how heavy/ how tall/ how

old/ how high)

15. You ____ forget what I told you. It’s very important. (can’t/ needn’t/ don’t have to/

mustn’t)

16. These medicines can ____ your headache. (elevate/ revive/ ease/ affect)

17. She covered her knees ____ a handkerchief. (in/ with/ under/ of)

18. I try to cheer him ____, but he just kept staring out the window. (on/ up/ off/ out)

19. Why not come over at the weekend? The children ____ seeing you again. (will enjoy/ are

enjoying/ enjoy/ is going to enjoy)

20. ____ is a long stick that someone put under their arm to help them walk when they have

hurt their leg. (wheelchair/ stretcher/ bandage/ crutch)

1
10 tháng 2 2020

You’d better put pressure ____ the wound and hold it tight. (on/ in/ to/ for)

3. Will you come ____ to my house on the weekend, Nam? (on/ in/ out/ over)

4. Nga came ____ of the hospital on Monday morning with good health. (on/ in/ out/ over)

5. The Ngo Si Lien Lane is ____ Quang Trung street and Tran Hung Dao street. (near/

between/ beside/ on)

6. You should cool the burn at once so as to ____ tissue damage. (ease/ relieve/ minimize/

maximize)

7. People use first-aid ____ ease the victim’s pain and anxiety. (so that/ in order to/ so as not

to/ in order that)

8. My parents promise they ____ back in about half an hour. (is/ be/ have be/ will be)

9. ____ I do the washing-up? - No, thanks. I can do it myself. (Will/ Would/ Shall/ Won’t)

10. Describing the ____ of the injured person is very important. (condition/ instructionh/

advice/ distance)

11. ____ is a type of bed used for carrying the sick or injured people. (stretcher/ ambulance/

bandage/ crutch)

12. I forgot thanking them ____ helping me. (about/ for/ of/ on)

13. She has been ____ for days after the accident. (conscious/ inconscious/ consciously/

unconsciously)

14. Scale is an instrument for showing ____ people or things are. (how heavy/ how tall/ how

old/ how high)

15. You ____ forget what I told you. It’s very important. (can’t/ needn’t/ don’t have to/

mustn’t)

16. These medicines can ____ your headache. (elevate/ revive/ ease/ affect)

17. She covered her knees ____ a handkerchief. (in/ with/ under/ of)

18. I try to cheer him ____, but he just kept staring out the window. (on/ up/ off/ out)

19. Why not come over at the weekend? The children ____ seeing you again. (will enjoy/ are

enjoying/ enjoy/ is going to enjoy)

20. ____ is a long stick that someone put under their arm to help them walk when they have

hurt their leg. (wheelchair/ stretcher/ bandage/ crutch)

Chia động từ trong ngoặc sao cho thích hợp: 1. Where's Mary? She (listen)______ to a new CD in her room 2. Don't forget to take your umberlla with you today.You know it (be)______ the raining season now 3. Jean always (learn) ______ English at this time every day but to day she (not study)_____ 4.What time _______ (the meeting/happen) tomorrow ? I (not know) ______ it get (i want)_____ for the announcement 5. Where _______(you/live) since you moved from you old house ? 6.Look ! The...
Đọc tiếp

Chia động từ trong ngoặc sao cho thích hợp:
1. Where's Mary? She (listen)______ to a new CD in her room
2. Don't forget to take your umberlla with you today.You know it (be)______ the raining season now
3. Jean always (learn) ______ English at this time every day but to day she (not study)_____
4.What time _______ (the meeting/happen) tomorrow ? I (not know) ______ it get (i want)_____ for the announcement
5. Where _______(you/live) since you moved from you old house ?
6.Look ! The sun (rise) ________ over the ocean.This is the most amazing scene I (ever/see)__________
7. He (speak)___________ Japanese so well because. He (come)___________ from Japan
8. ___________ (you/usually/go) for christmas or ___________ (you/stay) at home ?
9. Look! Your friend (hold) ___________ some roses.They (look)___________ lovely
10.___________ (you,finish)your assignement yet?No I ___________
11. My father usually (walk) ___________ to work but now hw (drive)___________ his car
12. I (not think) ___________ Mary (sleep)___________ because I can hear some noise from her room
13. My grandparents (bring) ___________ me up since I was very small
15. James (always/complain)___________ It (be) ___________ hard to plase him
16. I (just/realize) ___________ that there are only four weets to the end of them
17. This is the second time I (be) ___________ to London
18. Now the children (not want) ___________ to go to sleep.They (prefer) ___________ their mother to tell them bedtime stories.
19. ___________ (they/want) a horror movie before? yes, thay (watch)___________ a plenty of such movies before
20. Jim (cook) ___________ so tired now.He (work)___________ non-stop since the morning

0
I .Supply the correct word form 1. The duty of the police is the ............... of law and order ﴾maintain﴿ 2. Our tomatoes are .............. nicely, they'll be ready to eat in about a week ﴾ripe﴿ 3. Look at this picture of Bill and his father ‐ you can see the ............... clearly, can't you? ﴾like﴿ 4. He said "good morning" in a most ........... way ﴾friend﴿ 5. Playing for the national team for the first time was an ............. experience for Hong Son...
Đọc tiếp

I .Supply the correct word form

1. The duty of the police is the ............... of law and order ﴾maintain﴿

2. Our tomatoes are .............. nicely, they'll be ready to eat in about a week ﴾ripe﴿

3. Look at this picture of Bill and his father ‐ you can see the ............... clearly, can't you? ﴾like﴿

4. He said "good morning" in a most ........... way ﴾friend﴿

5. Playing for the national team for the first time was an ............. experience for Hong Son ﴾forget﴿

6. "this is not a good essay" said the lecturer 'i find your arguments ............... ﴾convince﴿

7. It's a lovely old house, I agree, but can we afford to ................... it? ﴾modern﴿

8. George and I have been friends since .............. he used to live next door ﴾child﴿

9. In winter it is important for farmers to provide food and ........... for their animals ﴾warm﴿

10. Pele ........... Ronaldo to take part in 2002 World Cup ﴾courage﴿

11. .............. is one of the qualities repuired of a social worker ﴾flexible﴿

12. Novelists are among the most .............. people in the world ﴾imagine﴿

13. Secondary education is .............. and free in many mountries ﴾compel﴿

14. The song has .............. been selected for the Sea Game 22, Vietnam ﴾office﴿

15. .............. are doing their best to make people aware of the danger of air pollution ﴾environment﴿

1

I .Supply the correct word form

1. The duty of the police is the maintenance of law and order ﴾maintain﴿

2. Our tomatoes are ripening nicely, they'll be ready to eat in about a week ﴾ripe﴿

3. Look at this picture of Bill and his father ‐ you can see the likeness clearly, can't you? ﴾like﴿

4. He said "good morning" in a most unfriendly way ﴾friend﴿

5. Playing for the national team for the first time was an unforgetable experience for Hong Son ﴾forget﴿

6. "this is not a good essay" said the lecturer 'i find your arguments unconvincing ﴾convince﴿

7. It's a lovely old house, I agree, but can we afford to modernize it? ﴾modern﴿

8. George and I have been friends since childhood he used to live next door ﴾child﴿

9. In winter it is important for farmers to provide food and warmth for their animals ﴾warm﴿

10. Pele encouraged Ronaldo to take part in 2002 World Cup ﴾courage﴿

11. Flexibility is one of the qualities repuired of a social worker ﴾flexible﴿

12. Novelists are among the most imagative people in the world ﴾imagine﴿

13. Secondary education is compulsory and free in many mountries ﴾compel﴿

14. The song has offically been selected for the Sea Game 22, Vietnam ﴾office﴿

15. Environmentists are doing their best to make people aware of the danger of air pollution ﴾environment﴿