It was in the lab was taken charge of by Professor Harris they did the experiment.
A. which, that
B. that, where
C. whom, that
D. which, where
网友回答
(答案→)A. which, that
B. that, where
C. whom, that
D. which, where
解析：考查定语从句和强调句型。第一空为非限制性定语从句，缺主语，故填that或which，第二空是强调句型部分，故填that，因此选A答案。句意：他们是在由Harris教授负责的那个实验室进行实验的。