At that time Tom was _______ o

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为什么选A，不选C？

解题思路：如下
解题过程：
At that time Tom was doing his homework.在那时tom正在做作业。
对不起，也不知道你的选项是什么？我给你现编了一个动词短语。该句根据时间副词应该用过去完成时，was/were+ving.如果你的答案中有v+ing ,你选它就对。
最终答案：略

Tom was noticed __into that room at that time.a .walk b.walk How_____I was at that time! B ) 39.It was the third time that I _______ in at his office 求五句英语变句型.Tom was in the room.I was a techer at that time.The My mother was cooking at that time? He was only in _______ at that time.A．his 30’s B．the 30’s C． At that time Tom was____one-year-old baby. Tom's grades _(frustrate) his parents at that time It was possible that I____go to America at that time. you know that i was thinking at that time Tom says that they ______basketball at six o'clock yesterday My mother was cooking at that time.的意思