問題詳情:
We must do something to _____ factories _____waste water into the river before it is cleaned.
A. stop; pouring . B. prevent; to pour C. keep; pouring D. stop; to pour
【回答】
A
知識點:動詞和動詞短語
題型:選擇題
問題詳情:
We must do something to _____ factories _____waste water into the river before it is cleaned.
A. stop; pouring . B. prevent; to pour C. keep; pouring D. stop; to pour
【回答】
A
知識點:動詞和動詞短語
題型:選擇題