—Whatareyoubusywithrecently?  —Wehavebeenlookingintoho...

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问题详情:

 —Whatareyoubusywithrecently?  —Wehavebeenlookingintoho...

 —What are you busy with recently?

   —We have been looking into how the machine breakdown __________.

   A. came out           B. came about          C. came down                     D. came up

【回答】

B

知识点:动词

题型:选择题

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