标题: 急~一道题求助！ [打印本页] 作者: 莫里亚提 时间: 2011-5-22 08:51 标题: 急~一道题求助！ When drive-ins were at the height of their popularity in the late 1950s, some 4000 existed in US, but today 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 为什么是B？ C哪里错了？