問題詳情:
---- 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
知識點:現在完成時及其被動式
題型:選擇題
問題詳情:
---- 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
知識點:現在完成時及其被動式
題型:選擇題