Americans eat______ as they actually need every day.

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问题 Americans eat______ as they actually need every day.

选项 A、twice as much protein
B、twice protein as much
C、twice protein as much
D、protein as twice much

答案A

解析句意：美国人每天所食用的蛋白质是他们实际需要的两倍。倍数的表达方法是:…times as…as…，在两个as之间可用many(修饰可数名词)，much(修饰不可数名词)和其他相应的形容词。所以答案是A。

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