1. Yesterday I(must/mustn't/had to) finish my English project
2. He will(must/have to/had to) wait in line like everyone else.
5. If you are under 15, you (have/must/mustn't) to get your parents' permission.
6. You may(have to/had/must) try on a few different sizes.
7. The doctor (must/mustn't/have to) get here as soon as he can.
giúp mk vs ạ
mk cần gấp
