单项选择题

We all regard ______ our duty to help those who are too poor to go to school.

A．this
B．it
C．that
D．which
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单项选择题
Most of the students went to see the film. There are only ______ students studying in the classroom.
A．few
B．a few
C．little
D．a little
单项选择题
Which skirt do you like best, the white ______ or the red
A．one; one
B．ones; ones
C．one; another
D．ones; other
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