EX1:

1.established

2.quickly

3.provided

4.decreased

5.destroy

6.exsist (sửa can thành can't nha :D)

7.save

EX2

1.Our exercises are corrected by our teacher at home

2. ko bt :l

3.Several new school is being built in our town

4.Great progress in industry ,science and medicine has been made 

5.A lion was killed by Sam last week

6.Your report must be handed in before the end of this month

7.That box hasnt been opened for the past hundred years

8.Are these letter going to be mailed soon?

9.The report should have been finished yesterday

10.He is said to be the riches man in our town

11.She fell into the water because she was pushed

12.It is time for the cows are brought in

13.What question are set by the examiners?

14.Something must be done for these poor men

15.My question hasnt been answered properly

16.This child has been broght up badly

17.Jane was promised a prized if she worked well

18.Lessons should be made more interesting for school children by the teachers