摘要： The letter I received from him yesterday is very important. A. who B. where C. what D. that [解析]答案:D.该题考查的是定语从句的关系代词的选择.因为先行词是物.而关系代词在定语从句中作宾语.所以只有that合适. 3---Where is the scientist gave us the talk yesterday? ---He has gone back to Qinghua University. A. whom B. who C. whose D. which [解析]答案:B.该题考查的是引导定语从句的关系代词的选择.因为先行词是人.而关系代词又在定语从句中作主语.所以只有who合适.

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