问题描述：
为什么
Americans eat( )as they actually need every day.(CET4 1998,6)
A) twice as much protein B) twice protein as much twice C) twice protein as much D) protein as twice much
为什么C不对
Americans eat( )as they actually need every day.(CET4 1998,6)
A) twice as much protein B) twice protein as much twice C) twice protein as much D) protein as twice much
为什么C不对
问题解答：
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