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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