【題目】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】D

【解析】

試題分析：句意：美國人現(xiàn)在每天吃的蔬菜是1990年的兩倍。倍數(shù)表達(dá)方式：倍數(shù)+as…as…，第一個(gè)as后加形容詞或副詞，第二個(gè)as后加比較對象，故選D.

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