新prep part 2的185题 答案和GWD上的有出入??

kelly1987

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

A. there are less than one-quarter that many

B. there are fewer than one-quarter as many

C. there are fewer than one-quarter of that amount

D. the number is less than one-quarter the amount

E. it is less than one-quarter of that amount

GWD上说是选择C，解释B的时候说是没有as many这个用法??
prep上说是选择B，说是as many后面是省略????

好晕??
咋办??
大牛救我??

aeoluseros

以prep为准，因为prep里才是官方的答案。