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The teacher said that we should finish our homework by ourse

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The teacher said that we should finish our homework by ourselves , _____ ?
A. didn't he B. shouldn't we
选什么,解释一下
The teacher said that we should finish our homework by ourse
The teacher said that we should finish our homework by ourselves , _____ ?
A. didn't he B. shouldn't we
反意疑问句,助动词与前者一致
所以前面是said,过去式,助动词为did
所以是A
如果说话者是第一人称,那么就是B
第三人称,是A