题目内容
I. 根据句意用适当的介词填空。
1.I rang the bell, but nobody replied ___________ me.
2.I felt too sorry ___________ what I had done.
3.She wrote some letters ___________ her friends, but got no from them.
4.They kept thinking ____________ the problem all the time.
5.What’s wrong __________ you? Can you tell me?
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