—Mum,Tomisalwaysworkinglateintonight.Idon'tknowwhatheis...
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问题详情:
—Mum, Tom is always working late into night. I don't know what he is busy doing.:状_元_源Z_—Oh ,he _____for his new project.
A. has prepared B. had prepared C. has been preparing D. was preparing
【回答】
C
知识点:现在完成进行时及其被动式
题型:选择题
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