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【Thepollutionproblemhereseemstogetmoreandmoreserious.----Yes.Somethine___aboutit.AhasdoneBmustbedoneCisdoingDwasdone回答并给我简单的讲讲.】
题目内容：
The pollution problem here seems to get more and more serious.----Yes.Somethine___about it.
A has done
B must be done
C is doing
D was done
回答并给我简单的讲讲.优质解答
B must be done
一定要采取措施
A has done
B must be done
C is doing
D was done
回答并给我简单的讲讲.
优质解答
一定要采取措施
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