Question

---Must I return the hook tomorrow morning?

---No, you ________．You can keep it longer．

1. A.
   mustn't
2. B.
   can't
3. C.
   needn't
4. D.
   couldn't

Answer 1

C
情态动词的考察回答以must引导的一般疑问句，肯定回答用Yes, Sb．must．“是的，……必须”否定回答用No, Sb．needn’t“不，……不必”