求教一道GWD8-41的语法题，急！ 谢谢高人指教。

catherine9119

GWD-8-Q41:

When drive-ins were at the height of their popularity in the late 1950’s, some 4,000 existed in the United States, but today there are less than one-quarter that many.

1. there are less than one-quarter that many
   
   
2. there are fewer than one-quarter as many
   
   
3. there are fewer than one-quarter of that amount
   
   
4. the number is less than one-quarter the amount
   
   
5. it is less than one-quarter of that amount
   答案选B
   
   

云南

好像这道题的答案不统一，我觉得there be 这样的句子基本就是错的。