Do you know the reason ____ he was late？
A. for which
B. for what
C. which
D. of which
查看答案
The day ____ （在那天我第一次遇见他）was the first of May on the Great Wall.
Washer is a machine ____ （用它我们洗衣服）or a person who is washing.
The reason ____ （为什么这事情会这样）is now clear. I don't need to explain it once more.
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