----Whydoesthelakesmellterrible?----Becauselargequantit...
问题详情:
---- Why does the lake smell terrible?
----Because large quantities of water________
A. have polluted B. is being polluted C. has been polluted D. have been polluted
【回答】
D
知识点:现在完成时及其被动式
题型:选择题