Ex1:
1. might have
2. had to 
3. didn't have to
4. could
5. shouldn't have
6. couldn't have
Ex2:
1. don't have to
2. must
3. Do you have to /don't have to / must
4. do not need to / must

help

Ex1:

1, might have

2, had to

3, didn't have to

4, could

5, shouldn't have

6, couldn't have

Ex2:

1, don't have to 

2, must

3, Do you have to - don't have to - must

4, do not need to - must

27. has never been

28. created

29. However

30. disconnecting

31. through

32. has become

33. with

34. to explore

35. However

32. has become
33. with
34. to explore
35. However
36. prevent

Help

6B 7C 8D 9C 10C 11D 12D 13B 14A 16B 17A 18A 19B 20C 21A 22B 23D 24B 25A 26C 27B 28A 29D 30B 31D

6B,7C,8D,9C,10C,11D,12D,13B,14A,16B,17A,18A,19B,20C,21A,22B,23D 24B,25A,26C,27B,28A,29D,30B,31D

I.

1A 2D 3B 4C

II.

5D 6A 7B 8B

III.

9B 10B 11A

IV.

12A 13B 14A

15C 16B 17B 18A 19B 20C 21D 22C 23B 24D 

Help

bạn ơi bạn chụp cả đáp án A nữa, ko có sao mk giúp đc

1 g

2 a

3 f

4 c

5 b

6 h

7 e

8 d

1 C

2 A

3 B

4 C

5 A

6 B

7 A

8 C

9 C

10 A

11 C

12 A

13 B

14 C

15 A

Bài 2

1 When

2 in case

3 since

4 although

5 before

6 as long as

7 as though

8 because

9 while

10 As long as

33 Now I don't go climbing as much as I used to when was younger

34 There used to be dreadful fogs in England

35 We haven't decorate the room for years

36 The other guests will start dinner before we arrive 

37 I wish the school holidays were longer

38 He is too young to join the club

39 It's very necessary to blame him for his mistakes

40 It was obligatory for him to pass his itermediate level English examination

33. Now I don't go climbing as much as I used to when I was younger

34. There used to be dreadful fogs in England.

35. We haven't decorated the room for years.

36. The other guests will start dinner before we arrive. 

37. I wish the school holidays were longer.

38. He is too young to join the club.

39. It's very necessary to blame him for his mistakes.

40. It was obligatory for him to pass his itermediate level English examination.