It was Professor Smith________did the experiment in the lab yesterday evening.

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问题 It was Professor Smith________did the experiment in the lab yesterday evening.

选项 A、whom
B、who
C、what
D、which

答案B

解析本句是强调句型的基本结构“It is/was +被强调部分(通常是主语、宾语或状语) + that/who +其他部分”。构成强调句的It本身没有词义。强调句中的连接词一般用that，当强调主语且主语指人时也可用who，其余情况下均使用that。本题中被强调部分为充当主语的Professor Smith，指人，因此应该选用连接词who,故选B。

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本试题收录于：大学英语三级B级题库大学英语三级分类

大学英语三级B级

大学英语三级

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It was Professor Smith________did the experiment in the lab yesterday evening.

大学英语三级B级

大学英语三级

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