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In our class ________ of the students are girls.

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In our class________ of the students_______ girls．

A．three fifths；are   B．three fifth；are    C．three fifths；is  D．three fifth；is

In our class      of the students      girls.

A．three fifths; are             B．three fifth; are 

C．three fifth; is               D．three fifths; is

In our class, about        of the students are girls.
A．three fifth          B．third fifths         C．three fifths