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()6.—Let'sgooutforawalk.—You’dbetternot.Thesedaystheairisgettingmuchthanitwasbefore.A.betterB.worseC.cleanerD.easier

题目详情

() 6. —Let's go out for a walk.

—You’d better not. These days the air is getting much than it was be fore.

   A. better   B. worse

   C. cleaner   D. easier

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答案和解析

B