—Must I return the hook tomorrow morning? —No you _ .You can keep it longer.A. mustntB.

问题补充：

—Must I return the hook tomorrow morning? —No, you _ .You can keep it longer.

A. mustn

B. can

C. needn

D. couldn

答案：

A. mustn

B. can

(答案→)C. needn

D. couldn

解析：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”