Americans eat_____vegetables per person today as they did in 1910.
A．more than twiceB．a(chǎn)s twice as manyC．twice as many asD．more than twice as many
A
A[解析]more than twice表示數(shù)量，放在as … as結(jié)構(gòu)前，是……的兩倍多。美國人現(xiàn)在每人所吃的蔬菜是1910年的兩倍多。
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