A-A+ It was in the lab taken charge of by Prof. Hav 2022-08-12 10:07:06 问答库 阅读 195 次 问题详情 It was in the lab taken charge of by Prof. Havvis ______ they did the experiment. A) that B) whom C) when D) so 参考答案 A强调句型，强调地点。
