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()25.(2015•丹东)一Let'sgooutforawalk.—YouMbetternot.Thesedaystheairisgettingmuchthanitwasbefore.A.betterB.worseC.cleanerD.easier

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() 25. (2015 •丹东) 一Let's go out for a walk.

—YouM better not. These days the air is getting much than it was before.

   A. better   B. worse   C. cleaner   D. easier

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答案和解析
25. B