— Why does the lake smell terrible? — Be
题型:选择题
问题:
— 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
— 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