— 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 |