1. — Must we wear the school clothes tomorrow, Mr. Wang?
— No, you . Only on Mondays. Tomorrow is Tuesday.

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

B

对于must开头的一般疑问句，否定回答通常用needn't，表示“不必”，而mustn't表示“禁止”，can't表示“不能”，shouldn't表示“不应该”，根据题意，明天是星期二，不必穿校服，所以选B。

根据提示完成句子。
2. My father's mobile phone doesn't work and it needs (repair).
3. We need (remember) that what we see on social media is often not the whole truth about a person.
4. There's no need for you (worry) about failing your driving test because you have prepared well enough.
5. 我们能做什么来帮助有需要的人?
What can we do to help people ?

2. repairing/to be repaired
3. to remember
4. to worry
5. in need