—I saw Anna in the library yesterday.—You______her; she is still abroad.A、must n

游客2023-10-03  26

问题 —I saw Anna in the library yesterday.—You______her; she is still abroad.

选项 A、must not see
B、can’t have seen
C、mustn’t have seen
D、couldn’t see

答案 B

解析 “must have done”表示对过去事情的肯定猜测,其否定形式应用"can’t/couldn’t have done”,而不能用 mustn’t。例如:He couldn’t have been to that place alone,because he is just five years old! (他不可能自己一个人去那个地方,因为他才只有5岁!)
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