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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
amount+不可数名词：an amount of通常接不可数名词单数，是单数；the amounts of/an amounts of+不可数名词，是复数，如：large amounts of money were……；也有amounts+可数名词复数的情况，如：The amounts of carcinogens……。
number+可数名词：The number of+可数名词复数，是单数；a number of/numbers of+可数名词复数，是复数；the numbers of+可数名词复数，是复数
ron:"twice as many", "one-quarter as many", etc. are not only acceptable as idiomatic expressions but also extremely common in the english language.
amout修饰不可数名词
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
排除点，many fewer
as many 那么多
since this idiom is present in the correct answer, which was written by gmac, IT IS CORRECT.
as many 那么多,一样多
(D) the number指代不清；the amount指代不清，并且只能修饰不可数名词
可数名词
there are fewer than one-quarter as many（那么多）
as many=a number that is equal to another number ?表示同样的数字
They say the people of Los Angeles speak 12 languages and teach just as many in the schools.
in as many days/weeks/games etc.
A great trip! We visited five countries in as many days (=in five days).
*: "twice as many", "one-quarter as many", etc.都是非常常见的用法，记住这样的表达
some 4000==》其实指代的是4000 drive-ins ，是一个可数名词
since this idiom is present in the correct answer, which was written by gmac, IT IS CORRECT.
end of discussion.
as many=a number that is equal to another number
examples:
- They say the people of Los Angeles speak 12 languages and teach just as many in the schools.
- A great trip! We visited five countries in as many days.
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at the height of sth 在sth的鼎盛时期