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

答案及解析： D

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。