单项选择题

With the introduction of the computer, libraries, today are quite different from they were in the past.()

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

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He is used to flying by air and on no occasion () frightened.

A. he has ever felt
B. be ever feels
C. ever does he feel
D. has he ever felt
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After () for the job, you will be required to take a language test.

A. being interviewed
B. being interviewing
C. interviewing
D. having interviewed
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