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:动词时态与语态
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:动词时态与语态
题型:选择题