Ответ:

1)1. shouldn't

остальное should

3) 1. mustn't

2. doesn't have to

3. have to

4. should

5. has to

6. mustn't

4)1 had better end

2 had better not get

3 had better go

4 had better wear

5 had better not break

5) 1. can

2 must

3 mustn't

4 can't

5 must