19.We were late for school because of the heavy rain
<-->Because it.......................................................
21.Is it necessary for me to clean this table.
<-->Do I....................................................
24.Nam couldn't lift the box because he was weak.
<-->Nam couldn't.....................................................
27.Is spite having different characterss, we are close friends.
<-->Although..........................................................................
31.Getting a good job doesn't interest him.
<-->He.................................................
50.They are good math teachers.
<-->They....................................
53.He didn't enjoy the trip because of the heavy rain.
<-->The heavy rain................................................
72.Trung took a train to Sapa last Sunday.
<-->Trung............................................
73.You won't have to go to the meeting tomorrow.
<-->It will...............................................................
75.I've never talked to the headmaster before.
<-->It's....................................................
77.How long is it since he bought the computer?
<-->When................................................
78.There is on building in the city higher than this.
<-->This...................................................
81.How long was your flight from HN to HCM City.
<-->How long..............................................
82.My house is as big as Nam's.
<-->My house...............................
83.We started living here fifteen years ago.
<-->We ao...........................................
19.We were late for school because of the heavy rain
<-->Because it rained heavily, we were late for school.
21.Is it necessary for me to clean this table.
<-->Do I need to clean this table?
24.Nam couldn't lift the box because he was weak.
<-->Nam couldn't lift the box because of his was weakness.
27.Is spite having different characterss, we are close friends.
<-->Although we have different characters, we are close friends.
31.Getting a good job doesn't interest him.
<-->He isn't interested in getting a good job.
50.They are good math teachers.
<-->They teach math well.
53.He didn't enjoy the trip because of the heavy rain.
<-->The heavy rain prevent him from enjoying the trip.
72.Trung took a train to Sapa last Sunday.
<-->Trung went to Sapa by train yesterday.
73.You won't have to go to the meeting tomorrow.
<-->It will be unnecessary for you to go to the meeting tomorrow.
75.I've never talked to the headmaster before.
<-->It's the first time I've talked to the headmaster.
77.How long is it since he bought the computer?
<-->When did he buy the computer?
78.There is one building in the city higher than this.
<-->This building isn't as high as the one in the city.
81.How long was your flight from HN to HCM City?
<-->How long did it take you to fly from HN to HCMCity?
82.My house is as big as Nam's.
<-->My house is the same size as Nam's. (Câu này mk k chắc nhá :(()
83.We started living here fifteen years ago.
<-->We have lived here for 15 ý.