---Mum, May I go out to play?
---Sure, If your homework ______, you may go out to play.
| A．finishes | B．finished |
| C．is finished | D．was finished |
–Look! A man is cutting a tree on the moon.
--It ______ be true. The teacher said there is no air on the moon.
| A．can’t | B．may not |
| C．shouldn’t | D．mustn’t |
----Must I finish the work today, Mom?
----No, you _______________. You can finish it tomorrow.
| A．mustn’t | B．can’t |
| C．needn’t | D．shouldn’t |
—May I take photos in the museum?
—No, you . You obey the rules here.
| A．may not; can | B．mustn’t; may |
| C．can’t; can | D．mustn’t; must |
—who is the man over there ? Is it Mr.Wang ?
—No, it _____be him .Mr.Wang is much fatter.
| A．can’t | B．need |
| C．mustn’t | D．may |
---________ we clean the classroom at once?
---No, you________. You ________clean it after school
| A．Must, needn’t, can | B．Need, mustn’t ,may |
| C．Must, mustn’t, can | D．Shall, can’t , may |