he was about to chang his mind when an idea_to him

he was about to chang his mind when an idea_to him
a occurred b had occured
c was occured d had been occured
舞伤 1年前 已收到2个回答 举报

2035480 幼苗

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选 A
这里occure发生,和happen一样,是没有被动语态的,所以排除C和D
when引导的时间状语从句,时态必须一致,主句用过去时,从句也用过去时.

1年前

1

zxjf 幼苗

共回答了1274个问题 举报

A

1年前

2
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