Americans are eating ______ vegetable per person today as they did in 1910.

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问题 Americans are eating ______ vegetable per person today as they did in 1910.

选项 A、more than twice
B、twice more
C、as twice
D、more than twice as many

答案C

解析 as...as的句型表达比较之意,twice放在名词vegetable前,表示两倍的量。
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