问题详情:
—Why does the river 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
问题详情:
—Why does the river 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