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
My sister has ______ friends at school. But she has good friends. ( )
A．few, a few
B．a few, few
C．little, a little
D．a little, little
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