问题
单项选择题
"It's really very kind （）you to help me with the housework on Sundays," said Grandma Huang.
A. of
B. with
C. for
D. from
答案
参考答案：A
解析：
考查介词的用法。表示真心地感谢他人的帮助时，可用“It's very kind of sb. to...”，故选A。
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