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Moreandmorepeoplehaverealizedwewon’thavecleanerwatertodrinkunlesssomethingsoon.A.wasdoneB.willbedoneC.tobedoneD.isdone

题目详情

More and more people have realized we won’t have cleaner water to drink unless something

             soon.

A was done         B will be done      C to be done       D is done

▼优质解答
答案和解析

D