单项选择题

To drive a car safely, it is ______ good brakes.

A．essential with
B．essential having
C．essential to have
D．essential have
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单项选择题
The matter is not to be ______.
A．watched for
B．waited on
C．taken over
D．trifled with
单项选择题
Bit by bit , a child makes the necessary changes to make his language ______.
A．as other people
B．as other people’s
C．like other people
D．like other people’s
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