—WhydidMikeignore(不理睬)mecompletelywhenIsaidhellotohim?—...
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问题详情:
—Why did Mike ignore (不理睬) me completely when I said hello to him?
—Oh, he was keeping ________ a problem.
A.think about B.to think about
C.to thinking about D.thinking about
【回答】
D
知识点:动词和动词短语
题型:选择题