题目

 The water will be polluted unless some measures _____.        A. will be taken     B. are being taken  C. are taken           D. were taken 答案：C19．二战中领导苏联军民英勇抗击法西斯侵略的是（　　）A．列宁B．丘吉尔C．斯大林D．罗斯福