问题: 英语选择题
It is said that Chinese eat ( )vegetables per person today as they did about 30 years ago.(a.more than twice b.as many as twice c. twice as many as d.more than twice as many）选择哪一个？为什么？
解答:
d.more than twice as many
twice as many+可数名词+as+比较对象，是固定用法。
今天的中国人均蔬菜消费量比30年前,要超过一倍以上的。
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