It was in the lab _____ was taken charge of by Professor Zhang ______ they did the experiment .
| A．where; that | B．which; where |
| C．that; where | D．which; that |
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It was in the lab _____ was taken charge of by Professor Zhang ______ they did the experiment .
| A．where; that | B．which; where |
| C．that; where | D．which; that |
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