单项选择题

A complete investigation into the cause of the accident should lead to im proved standards and should （） new operating procedures.

A．result in
B．match with
C．subject to
D．proceed with

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单项选择题

The girl knew there was something wrong with the sentence, but she didn't know how to put it （）

A．well
B．correct
C．right
D．straight

单项选择题

Fill in the blanks in the following options to choose the appropriate words（）

A．when
B．that
C．which
D．where

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