问题
选择题
It is clever _________ you _________ out the problem. [ ]
A. for; to work
B. of; working
C. to; working
D. of; to work
答案
答案：D
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It is clever _________ you _________ out the problem. [ ]
A. for; to work
B. of; working
C. to; working
D. of; to work
答案：D