Question

In the street I met the scientist ________ gave us a talk last week.

1. A.
   he
2. B.
   which
3. C.
   who
4. D.
   what

Answer 1

C
解析：
分析与
解答：本题考查定语从句连接词的用法。引导定语从句的关系代词that，which和who引导定语从句时在句中的职能和意义完全相同，即which用来指物，who用来指人，that既可用来指人也可用来指物。该题应首先排除A、D项；
先行词是scientist，指人，因此，该题的正确答案是C．who在定语从句中作主语。例如：(1)Was the book which/that you were reading a novel by Lu Xun? 你在读的那本小说是鲁迅写的吗?(2)The woman that/who/whom you saw just now is our new English teacher. 刚才你看到的那个妇女是我们的新英语老师。