题目内容

【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

【答案】B
【解析】句意:他现在很忙,不能和你说话。at once”立刻“;at present”现在,目前“;at the end”在.....末端/终点“;at first”起初“。因此答案选B。

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