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Theairinmycityisgettingmuchnowthanafewyearsold.A.cleanB.cleanerC.cleanestD.thecleanest

题目详情
The air in my city is getting much _____ now than a few years old.
A.clean B.cleaner C.cleanest D.the cleanest
▼优质解答
答案和解析
B ,比较级