- Mum must I do shopping tonight? - No you .You can do it tomorrow.A. cantB. needntC.

问题补充：

- Mum, must I do shopping tonight?

- No, you .You can do it tomorrow.

A. can

B. needn

C. mustn

D. shouldn

答案：

A. can

(答案→)B. needn

C. mustn

D. shouldn

解析：句意：--妈妈，今晚我必须去购物？--不，你不需要。你能明天做它。分析情态动词must 的一般疑问句，其否定回答要用need.故选 B