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题库 / Prep2008E2-SC-185
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.
there are less than one-quarter that many
there are fewer than one-quarter as many
there are fewer than one-quarter of that amount
the number is less than one-quarter the amount
it is less than one-quarter of that amount
请看讲解视频
some这里是副词，表示大约，大概，有点，如：
I fund the exam some interesting. 有点好玩。
Some thirty people attended the funeral. 大约有三十人参加了葬礼。
as many指代前面提到的数量，twice as many, one-quarter as many，也可以接名词。
本题的as many指代4000，less than one-quarter as many=less than one-quarter 4000
倍数的比较可以是as/as，more than或x times sth或x times a number
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