题目内容
--Is Lucy knocking at the door?
--No. It ________ be Lucy. She is in Japan now.
A. needn?t B. must C. can?t D. may
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题目内容
--Is Lucy knocking at the door?
--No. It ________ be Lucy. She is in Japan now.
A. needn?t B. must C. can?t D. may