单项选择题

The chair is not comfortable to sit in. It needs ______.

A．adjust
B．adjusting
C．adjusted
D．be adjusting
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单项选择题
The average speed of a ball hit by a Pingpang racquet (球拍)is the ______ among all ball games.
A．lowest
B．highest
C．quickest
D．most full
单项选择题
A good reader is one can who read ______ the lines.
A．between
B．under
C．in
D．above
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