题目内容
It was in the lab ________ was taken charge of by professor Black ________ they did the experiment.
[ ]
A.that; where
B.which; that
C.whom; that
D.which; where
答案:B
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题目内容
It was in the lab ________ was taken charge of by professor Black ________ they did the experiment.
A.that; where
B.which; that
C.whom; that
D.which; where