单项选择题

The computer,（）is a 20th century invention, has created startling technological changes in the way we organize and produce information.

A. that
B. which
C. what
D. it

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单项选择题
We all think that she is more intelligent than（）in the class.

A. any student
B. other student
C. any other student
D. other any student
单项选择题
Not until many years later（）

A. the whole truth became known
B. did the whole truth become known
C. the whole truth has become known
D. has the truth become known
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