单选题
No adults would like to admit that they are weaker than children
to solve sticky and puzzling problems.
A、
to solve about
B、
solve
C、
in solving about
D、
in solving
【正确答案】
D
【答案解析】
[解析] 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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