It was in the school he had studied he began the important experiment.A. that; whereB. i

发布时间：2020-08-17 13:15:56

It was in the school      he had studied      he began the important experiment.
A. that; where
B. in which; which
C. where; that
D. where; in which

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A. that; where
B. in which; which
C. where; that
D. where; in which
解析：这是一个强调地点状语的强调句。  
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