---John,whyareyousoupset? ---I mycellphoneall...
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问题详情:
---John, why are you so upset?
---I my cell phone all morning but it is nowhere to be found.
A. am looking for B. have been looking for
C. have looked for D. had looked for
【回答】
B
知识点:动词时态与语态
题型:选择题
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