题目内容
I haven't seen you for a couple of days. What have you been up ________.
[ ]
A.in
B.to
C.with
D.for
答案:
解析:
解析:
|
be up to 忙于……,从事……。 |
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题目内容
I haven't seen you for a couple of days. What have you been up ________.
[ ]
|
be up to 忙于……,从事……。 |