by the time l reached home my brother --- to worka\ wentb\ has gonec\ had goned was gone为什么答案是c理由越详细越好,好的有赏

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bythetimelreachedhomemybrother---toworka\wentb\hasgonec\hadgonedwasgone为什么答案是c理由越详细越好,好的有赏bythetimel

by the time l reached home my brother --- to worka\ wentb\ has gonec\ had goned was gone为什么答案是c理由越详细越好,好的有赏
by the time l reached home my brother --- to work
a\ went
b\ has gone
c\ had gone
d was gone
为什么答案是c
理由越详细越好,好的有赏

by the time l reached home my brother --- to worka\ wentb\ has gonec\ had goned was gone为什么答案是c理由越详细越好,好的有赏
by the time表示时间点,时间点是I reached home,表示是过去的时间点.所以要用过去,排除b,因为by表示截止到时间点,用完成时,排除ad,选C

这要看时间的关系,你到家时,看到了哥哥工作,说明哥哥在你到家之前就工作了,你到家是过去时,那哥哥工作在你之前,就是之前的之前,过去完成时