Помогите пожалуйста модальные глаголы
I’m sorry I’m late. ___ I come in?
a) May b) Can c) Must
2) I’m afraid, I ___ give you a lift today.
a) can b) can’t c) mustn’t
3) Ann was late and I ___ wait a little.
a) can b) can’t c) had to
4) You ___ always bring everything you need for classes.
a) can b) must c) could
5) You ___ eat a lot of sweets. They’re bad for your teeth.
a) can’t b) mustn’t c) shouldn’t
6) You ___ buy a present for Tim. I’ve already bought it.
a) don’t have to b) mustn’t c) shouldn’t
7) If you want you ___ have a short break.
a) may b) must c) should
8) He ___ count to ten. He’s too little.
a) can’t b) mustn’t c) shouldn’t
9) Look at the sign! You ___ smoke here.
a) can’t b) mustn’t c) shouldn’t
10) I ___ sleep last night because it was very hot.
a) can’t b) mustn’t c) couldn’t