问题
选择题
When ___help, one often receives"Thank you!" or "It's kind of you!"from others.[ ]
A. offering
B. to offer
C. to be offered
D. offered
答案
答案：A
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When ___help, one often receives"Thank you!" or "It's kind of you!"from others.[ ]
A. offering
B. to offer
C. to be offered
D. offered
答案：A