His mother found him ________ inventing different kinds of things A,being good at
B,to be well in C,good with D,good at
人气：102 ℃ 时间：2020-03-17 20:48:02
解答
A find sb后只跟doing,done ,（to be） adj.不跟不定式和动词原形.这里选项A是be动词的doing形式,就是being,be good at 是固定用法
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