The air in Beijing is getting much _____ now than a few years ago.A.clean B.cleaner C.cleanest D.the cleanest哪个正确,理由?

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TheairinBeijingisgettingmuch_____nowthanafewyearsago.A.cleanB.cleanerC.cleanestD.thecleanest哪个正确,理由?

The air in Beijing is getting much _____ now than a few years ago.A.clean B.cleaner C.cleanest D.the cleanest哪个正确,理由?
The air in Beijing is getting much _____ now than a few years ago.
A.clean B.cleaner C.cleanest D.the cleanest
哪个正确,理由?

The air in Beijing is getting much _____ now than a few years ago.A.clean B.cleaner C.cleanest D.the cleanest哪个正确,理由?
B.后面有than,可知前面要填比较级,又因为是二者之间的比较,所以B

B
必须是比较级与后面的than呼应

b
比较级. much 后面跟比较级 than 什么什么什么.

选B.
much专门修饰比较级..且这句话后面有than