16 to => for

17 occur => would occur

18 would have studied => had studied

19 will be => is

20 saw => see

11 be => been

12 because => if

13 is => were

14 will study => study

15 to go => go

6 would stop => would have stop

7 you would => would you

8 is not => had not been

9 had I => I had

10 will go => would go

1 would find out => would have found out

2 bỏ will

3 knew => known

4 am => were

5 find in => find

12 A

13 A

14 C

15 B

16 B

17 B

18 A

19 C

20 C

27 D

28 C

29 A

30 D

22 C

23 B

24 B

25 D

26 C

17 D

18 C

19 D

20 B

21 A

12 B

13 A

14 C

15 B

16 C

7 B

8 C

9 B

10 C

11 C