题目内容
It was in the lab ________ was taken charge of by professor Black ________ they did the experiment.
A.that; were
B.which; that
C.whom; that
D.which; where
答案:B
提示:
提示:
第一个空用which引导的定语从句修饰the lab,后面的that 和前面的it was…构成it was… that…强调句型
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