There are only———factories in this city————before.A.one-fifth as many ...asB.one-fifth fewer...than 我感觉语法上 这两个选项都是正确的.请教下为什么选B 不选A类.

问题描述:

There are only———factories in this city————before.
A.one-fifth as many ...as
B.one-fifth fewer...than 我感觉语法上 这两个选项都是正确的.
请教下为什么选B 不选A类.