It was in the lab ________ was taken charge of by MR. Harris ________ they did the experiment.A.which; thatB.that; whichC.which; whereD.that; who
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A解析本题考查定语从句和强调句型的区分。前项应填关系代词which或that引导定语从句，因为要在引导的从句中做主语；而后项要填that构成强调结构，本句意思为“是在Harris先生负责的那个实验室里他们做了那个试验”。