题目内容
-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
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--- 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 |