It was in the lab was taken charge of by Johnson they did the experiment.
A. where; which
B. which; that
C. which; which
D. that; which
网友回答
A. where; which
(答案→)B. which; that
C. which; which
D. that; which
解析：第一空是which引导的定语从句，先行词是lab，which在定语从句中主语。第二空是that，是强调句型里的that。这是强调句型其结构是It was+被强调部分+ that+其他，判断强调句型的方法是把It was that去掉整个句子不缺成分，是成立的。