1.should
2.mustn't
3.mustn't
4.should/had better
5.shouldn't/had better n't
6.had better
7.had better
1.teeth
2.to take
3.bought
4.not carry
5.Don't worry
1.should
2.mustn't
3.mustn't
4.should/had better
5.shouldn't/had better n't
6.had better
7.had better
1.teeth
2.to take
3.bought
4.not carry
5.Don't worry