单选题
No adults would like to admit that they are weaker than children {{U}}to solve sticky and puzzling problems{{/U}}.
A、
to solve about
B、
solve
C、
in solving about
D、
in solving
【正确答案】
D
【答案解析】
[分析] 固定搭配 be weak at/in sth．或be weak in doing sth．表示：……较弱，不擅长……；或不擅长做某事。所以答案为D。
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