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:B
解析:
提示:
解析:
| 胜任,从事于……。
|
提示:
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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
| 胜任,从事于……。
|