问题补充:
It is said that this is the biggest lab they have ever built in their school.
A. which
B. what
C. 不填
D. where
答案:
A. which
B. what
(答案→)C. 不填
D. where
解析:考查定语从句。当表示事物的先行词前面有最高级修饰的时候,使用关系代词that,当关系代词在句子做宾语的时候,又可以省略。本题的that指代前面的先行词the biggest lab,在句中做built的宾语,可以省略。
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