Упр 2
1. mustn't
2. can't
3. shouldn't
4. mustn't
5. shouldn't
Упр 3
1. Can she play chess?
2. Can he play hockey?
3. May they go to the cinema?
4. May I open the wondow?
5. Must children and adults clean their teeth twice a day? или How often must children and adults clean their teeth twice a day?
Упр 4
1. don't
2. must
3. to
4. not
5. speaks