—John,couldyoucomeandhelpmeinthekitchen,please?—Sorry,M...
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问题详情:
— John, could you come and help me in the kitchen, please?
— Sorry, Mum. I_________ Tom search for information on the net.
A.help B.helped C.have helped D.am helping
【回答】
D
知识点:动词时态
题型:选择题