It's time for us to take measures to stop water ______ as it is getting more and more serious.
A.standard
B.population
C.condition
D.pollution

A.A.standard
B.population
C.condition

【参考答案】

D
解析：pollution的意思是“污染”。standard的意思是“标准，规格”，例如：Students h......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)