问题补充:
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
答案:
(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。第一空关系代词Which引导定语从句,在句中做主语。第二空that与it was构成强调句型。句意:就在由Harris教授负责的那个实验室里,他们做了那个实验。故A正确。