Question

【题目】— Hi, madam. Can I take the story books out?
— No, my boy. They ______ be taken out of the reading-room. It's a rule.
A.mustn't
B.needn't
C.couldn't
D.wouldn't

Answer 1

【答案】A
【解析】句意：——嗨，夫人，我可以把这些故事书带出去吗？——不行，孩子。它们不能被带出阅览室，这是规定。mustn't 必须不；一定不要，表示禁止。needn't 不必要；couldn't不能，不会，表示能力。wouldn't不会，表示过去将来。根据句意可知选A。