题目内容

______ frightened me was a loud crash from the next door.

A. How
B. What
C. That
D. Why

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He got a message from Miss Zhang_______ Professor Wang couldn't see him in the following day.

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

_______ we need more practice is quite clear.

A. When
B. What
C. That
D. If

______ I accepte the gift or refuse it is none of your business.

A. If
B. whether
C. When
D. How

_______ certain that his invention will lead to the development of production.

A. That's
B. This is
C. It's
D. What's

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