—Ididn’tseeyouatthebeginningofthepartylastnight.—I   on...

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问题详情:

—Ididn’tseeyouatthebeginningofthepartylastnight.—I   on...

—I didn’t see you at the beginning of the party last night.

—I     on my biology report at that time.

ed          working   working

【回答】

C 

知识点:动词时态

题型:选择题

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