dm mày

bạn rảnh quá ha!

gggggggggggggggggggggggggggggggg

1:If we ( destroy) ___ destroy__the forest ,we(polluted)___will polluted___the enviromment.

2:if you (save)__save____electoricity,we (help)_will hlep_____the enviromment

3:if it (be)____is____ugly, I (not play)__won't play______football

4:if she (not do)_doesn't_____her homework,her teacher (punish)_will _punish___her

5:if  we (not recycle) _don't __ recycle____old thìgs,we (not protect)__won't_protect______the Earth

ggggggggggggggggggggggggggggggggg

Passive Voice => Active voice

1. They have told I about it since yesterday.

2. We will hold the meeting before May Day.

I. Sắp xếp thành câu đúng:

1 Waiting/ is /you/ for /who/?

-> Who you are waiting for ?

2 us/ of/ all/ song/ Happy Birthday/ sing/ the

->  All of us sing the song Happy Birthday

II. Gạch chân lỗi sai rồi sửa

1 Can I have some milk to my coffee, please -> in

2 There is a lamp reading on the desk -> reading light

3 How old do you ride a bicycle? Everyday -> often

hocj xong chua

What is your car?

Dịch: Xe của bn là gì?

hok tốt!

Xe của bạn là gì?

What is your favourite color?

My favourite color is......

Học tốt nhé!

^^

.....favorite...?

 My favorite color is pink.

 ~ học tốt ~

  k mk nha

stay in shape có nghĩa là có vóc dáng đẹp, giữ được dáng

what does the writer mean by "stay in shape"? nghĩa là

nhà văn có ý nghĩa gì khi "giữ dáng"?

Where do you live?

dịch: Bạn sống ở đâu?

hok tốt!

dịch : bạn sống ở đâu ?

   chúc bạn hok tốt

1.They are basketball players.

Negative:They aren 't basketball players.

Question: Are they basketball players?

2.We are hungry.

Negative: We aren 't hungry.

Question: Are you hungry?

3.It is a giraffe. 

Negative: It isn 't a giraffe

Question: Is it a giraffe?

4.She is a good singer. 

Negative: She isn 't a good singer.

Question: Is she a good singer?

5.They are students. 

Negative: They aren 't students.

Question: Are they students?

6.Mrs.Dung is in the ...

câu này bn viết thiếu đề hả bn?

7.Lan and Mai are in the same class. 

Negative: Lan and Mai aren 't in the same class. 

Question: Are Lan and Mai in the same class? 

8.Mr and Mrs Brown are engineers. 

Negative: Mr and Mrs Brown aren 't engineers.

Question: Are Mr and Mrs Brown engineers?

hok tốt!

Xét hiệu \(2a^2+2b^2-4ab\)

  \(=2a^2-4ab+2b^2=2\left(a^2-2.a.b+b^2\right)\)

\(=2\left(a-b\right)^2\ge0\)

\(\Rightarrow2a^2+2b^2\ge4ab\).Dấu "=" xảy ra khi \(a=b\)