【题目】—Lucy doesn't mind lending you her dictionary.
—She______.I have already borrowed one.
A.can't
B.mustn't
C.needn't
D.shouldn't

【答案】C
【解析】考查情态动词。can't不会，不可能；mustn't不准，禁止；shouldn't不应该，均与句意不符。C项表示“不必，不需要”，符合句意：她不必把她的字典借给我了，我已经借了一本。