题目内容
hen________ help, one often says “Thank you.” or “It’s kind of you.”
A.offering B.to offer C.to be offered D.offered
D
时间状语从句省略he is。

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题目内容
hen________ help, one often says “Thank you.” or “It’s kind of you.”
A.offering B.to offer C.to be offered D.offered
D
时间状语从句省略he is。