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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 ==》n .通常去修饰不可数名词（但是amount这个词本身是可数名词的）==》 a large amount of work, money, furniture //
Food was provided in varying amounts.
amount也可以用作v.总计 达到 Our information doesn't amount to much 我们的资料有限
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