从高考题看as……as结构与名词的位置关系

请看一组高考题:1.Our neighbor has___ours.(03’北京卷) A.as a big house as B.as big a house as C.the same big house as D.a house the same big as(答案:B) 2.Americans eat__vegetables per person today as they did in 1910.(02’上海春季卷) A.more than twice B.as twice as many C.twice as many as D.more than twice as many(答案:D) 3.It is generally believed that teaching is__