3)倍数＋名词 
 
The sun is many times the size of the moon. 

4)动词＋倍数 

The pants have shortened two times since they were bought. 

5)动词+by+数词/百分比/倍数 
 
The landlord wanted to raise the rent by a third. 

Between 1974 and 1997, the number of overseas visitors expanded 
( )27%. (CET-4 2000,1) 

A) by 
B) for 
C) to 
D) in 

本题考查动词+百分比的表达方法，正确的连接词为by，故答案为A.