单项选择题

There is not much time left for you to cover everything, you'd better ______ unimportant points. ( )

A．leave off
B．focus on
C．leave out
D．concentrate on
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单项选择题
To my great surprise the food was still on the table, ______. ( )
A．not to be touched
B．untouched
C．untouching
D．no touch
单项选择题
If ______, he promises that he will spare no effort in promoting public welfare. ( )
A．elected
B．elect
C．electing
D．being elected
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