-Hello! Is Mr. John in the office?-Yes. But I'm sorry. He is busy and can't speak to you.A

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【题目】-Hello! Is Mr. John in the office?

-Yes. But I'm sorry. He is busy __________ and can't speak to you.

A. at once B. at present

C. at the end D. at first

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【答案】B

【解析】

考查短语辨析。句意:——喂，约翰先生在办公室吗？——是的，但是对不起，他目前很忙不能和你说话。A:立刻；B:目前；C:在结尾；D:首先。