---Must I clean the room now?

---No, you _______. You can do it tomorrow.

A．mustn’t               B．must                   C．needn’t              D．need

--This desk is too heavy．I _______ move it．Could you help me?

--No problem．

A．can               B．can't               C．should              D．shouldn't

--Must I go to the shop with you，Mum?

--Err…I can make it myself，Mike．You _______ go with me．

A．mustn't             B．shouldn't           C．wouldn't         D．needn't

–Whose shirt is this?

--It _______ be Li Lei’s. It is too big for him.

A．could              B．must                 C．can’t               D．might

Necessary action _______ so that students can be safe at schools．

A．can be taken                            B．must be taken

C．may be taken                            D．might be taken