The air in Beijing is getting much              now than before.

A. clean    
B. cleaner  
C. cleanest        
D. the cleanest
B
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科目:初中英語 來源:期中題 題型:單選題

The air in Beijing is getting much              now than before.
[     ]
A. clean    
B. cleaner  
C. cleanest        
D. the cleanest

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