-Mum，I'mgoingclimbing．MustIcleantheroomnow？-No，you

問題詳情：

-Mum，I'm going climbing．Must I clean the room now？

-No，you_____________．You can do it this evening．

A．can't   B．mustn't     C．needn't

【回答】

C

知識點：情態動詞

題型：選擇題