when drive-ins were at the height of their popularity in the late 1950's, some 4,000 existed in the US, but today there are less than one-quarter that many.
C.there are fewer than one-quarter of that amount
E. it is less than one-quarter of that amount
答案: C
amount 不是单数吗? 我觉得C 应该说there is 吧?
E 为什么错?
这里的some 4,000 existed in the US是插入语,去掉后看,there are后面的应该是drive-ins,所以用复数
而且修饰drive-ins不能用amount呀,要用number
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