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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
没懂D错在哪里~求解释~B的as many感觉好奇怪啊
个人意见：不能说数number少于1/4
数字不能用less，是可数的
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