单项选择题Compared with last year, the output of the factory this year has increased()20%.

A.with  
B.at   
C.for  
D.by

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1Come and see me if you have time.()

A.I can't.  
B.I'll think it over.
C.Thank you.
D.I will.

2Chinese is spoken by the()number of people in the world.

A.smallest 
B.most 
C.largest 
D.wide

4China is()the Great Wall.

A.on 
B.famous
C.famous for
D.famous as

5Charlie thinks money will()all his problems.

A.score
B.solve  
C.force   
D.perform