问题描述：
We have _____ books to read every year.
A.three hundred
B.three hundred of
C.three hundreds
D.three hundreds of
In China,bikes and buses are two popular _____ of tranaportation.
A.parts
B.kinds
C.things
D.subjects
A.three hundred
B.three hundred of
C.three hundreds
D.three hundreds of
In China,bikes and buses are two popular _____ of tranaportation.
A.parts
B.kinds
C.things
D.subjects
问题解答：
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