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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
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要注意number和amount指代的不是一件事。number指代的是数字，amount指代的是数。在这道题中，number指代的是4000这类的数字，amount指代的是数量。
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