标题: 比较句中than后重复主语省略吗？ [打印本页] 作者: kuan89 时间: 2011-8-12 16:49 标题: 比较句中than后重复主语省略吗？ 我看了manhattan里说，比较句里只要不ambiguous可以省略后面相同的主语： 如，P129 I walk as fast now as [I walk] when I was younger. 此处省略I walk P257 We have even more engines taht are efficient than before. 此处省略we have？
但是 OG12-P704，41题 To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility. (A) have to know a great deal more than now about the social and economic (B) have to know a great deal more than they do now about the social and economical (C) would have to know a great deal more than they do now about the social and economical (D) would have to know a great deal more than they do now about the social and economic (E) would have to know a great deal more than now about the social and economic
答案选D，并且对于A的解释是wrong comparison between knowledge and time(now)。。