题目内容

The student entered the office without.

A. being asked
B. asking
C. ask
D. to be asked

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The new college graduate insistedwhere he was most needed.

A. to be sent
B. on being sent
C. on sending
D. to send

All cars ______ nowadays are equipped with safety belts.

A. to be produced
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C. producing
D. produced

--I usually go to Shanghai by train. --Why not ______ there by boat for a change.9

A. to try to go
B. try going
C. to try going
D. try to go

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A. 带状切屑
B. 节状切屑
C. 粒状切屑
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