问题描述：
单选_____of the students in our class are from the north
_____of the students in our class are from the north.
A.Two-nineth
B.Two-ninth
C.Two-ninths
D.Two-nineths
为什么?
_____of the students in our class are from the north.
A.Two-nineth
B.Two-ninth
C.Two-ninths
D.Two-nineths
为什么?
问题解答：
我来补答展开全文阅读