题目内容
When_______help, one often says “Thank you.” or “It’s kind of you”.
A. offering B. to offer C. to be offered D. offered
D
解析:
根据句意可以得知when之后省略了one is。
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When help, one often says, “Thank you”, or “It’s kind of you.”
A.offering |
B.to offer |
C.to be offered |
D.offered |