I was out of town at the time, so I don't know exactly how it _____. [ ]A. was happening B. happened C. happens D. has happened -高中英语-n多题

◎ 题干

I was out of town at the time, so I don't know exactly how it _____.

A. was happening
B. happened
C. happens
D. has happened

◎ 答案

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◎ 解析

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◎ 知识点

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