he went home ( ) he had finished his homework.A.when B.while C.as D.and和原因

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he went home ( ) he had finished his homework.A.when B.while C.as D.and和原因
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he went home ( ) he had finished his homework.A.when B.while C.as D.and和原因
he went home ( ) he had finished his homework.A.when B.while C.as D.and
和原因

he went home ( ) he had finished his homework.A.when B.while C.as D.and和原因
C
这里as解释为“因为”
如果用when,从句用过去时,不需要用过去完成时
用while的话,后面要进行时的
用and 意思错了
【俊狼猎英】

c,他完成家庭作业后回家了

as表示原因,选C。when在……的时候,两个动作同时发生。while两个动作有先后。

选A
when“当…时”,引导的从句可用短暂性动词,可用延续性动词,与主句所表述的动作可有先后,也可同时,例如亲所问的这个句子: He went home when he had finished his homework.