More and more people have realised we won't have cleaner water to drink unless somethine___________More and more people have realised we won't have cleaner water to drink unless somethine________soon.A.was done B.will be done C.to be done D.is done

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More and more people have realised we won't have cleaner water to drink unless somethine___________
More and more people have realised we won't have cleaner water to drink unless somethine________soon.
A.was done B.will be done C.to be done D.is done应怎么翻译,选哪一个,为什么?

B will be done根据后面的soon,说明还没发生,要将来时

B~~