题目内容

---Where is the scientist ________ gave us the talk yesterday?

---He has gone back to Qinghua University.

A. whom B. who C. whose D. which

B 【解析】句意:——昨天给我们做演讲的那位科学家在哪里?——他已经回到清华大学。whom引导定语从句,修饰人,作宾语或表语;who引导定语从句,修饰人,作主语,宾语或表语;whose引导定语从句,修饰名词,作定语;which引导定语从句,修饰事物,作主语,宾语或表语;此处先行词the scientist表示人,在定语从句中缺少主语,故用who引导,故选B。
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