相关_____ofthewater_____的文学知识

问题详情：_____ofthewater_____polluted.Wemusttrytoprotectourenvironment.A.Twothird;are B.Twothird;is   C.Twothirds;are    D.Twothirds;is【回答】D【解析】句意：三分之二的水被污染了。我们必须保护我...