1)     Should

2)     Should

3)     Must

4)     Don’thave to

5)     Must

6)     Mustn’t

7)     Should

Ex.2

1)      We mustn’t text our…

2)      You should read through your….

3)      He doesn’t have to wear schooluniform.

4)      Which phone should I buy?

5)      We didn’t have to book…

6)      You shouldn’t wear your…

7)      Both drivers and passengers must haveseat belts.

Под все три глагола подходит предложение №2.