Americans eat vegetables per person today as they did in 1990.A. more than twiceB. as twic

问题补充：

Americans eat vegetables per person today as they did in 1990.

A. more than twice

B. as twice as many

C. twice as many as

D. more than twice as many

答案：

A. more than twice

B. as twice as many

C. twice as many as

(答案→)D. more than twice as many

解析：考查倍数表达。more than twice as many vegetables as两倍多的蔬菜;倍数要放在as…as结构的前面。句意：美国人现在每天吃的蔬菜是1990年的两倍多。