______ of the river has been polluted.A、Second-threeB、Two-threeC、Two-thirdD、T

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问题 ______ of the river has been polluted.

选项 A、Second-three
B、Two-three
C、Two-third
D、Two-thirds

答案 D

解析连字符前面是基数词，后面是序数词。如果基数词大于等于2，序数词要加s。

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