问题
选择题
It's kind ______ you ______ the old people. [ ]
A. of; to help
B. for; to help
C. of; helping
D. for; helping
答案
答案：A
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It's kind ______ you ______ the old people. [ ]
A. of; to help
B. for; to help
C. of; helping
D. for; helping
答案：A