单项填空
问题描述：
单项填空
It was in the lab ( ) was taken charge of by Professor Black ( )
they did the experiment.
a that where b which that c when that d which where
答
选A
在由布莱克教授负责的实验室做实验
第1处填THAT,是因为the lab是take charge of 的宾语,
第2处填where,是代指they did the experiment的地点