Americans are eating (more than twice as many) vegetables per person today as they did in 1910.
当今美国人平均每人每天比1910年多吃两倍的蔬菜还多.
A.more than twice 超过二倍,这个比较不合理
B.as twice as many没这样说的
C.twice as many as 如果把vegetables放在twice后面就可以了