老师这个是课外问题，我想请教一下twice 用法怎么用？ Chinese eat_____ vegetables per person today as they did in the past . A;more than twice as many B;more than twice C;twice as many as D;as twice as much

你想问什么？让我帮你选，先自己做好，并说出原因？我再帮你。

我不懂twice的用法。我选A或者B

A;more than twice as many