题目
— Has Sam finished his homework today?
— I have no idea． He ______ it this morning.was doing.x05A． did x05B． has donex05C． was doing x05D． had done A为什么不对
— I have no idea． He ______ it this morning.was doing.x05A． did x05B． has donex05C． was doing x05D． had done A为什么不对
提问时间：2020-07-24
答案
举一反三
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