国际顶尖MBA申请交流平台--TOPWAY MBA

标题: XY13-1的第32题 [打印本页]

作者: greatvampirer 时间: 2007-2-17 07:05 标题: XY13-1的第32题

Q32:

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

have to know a great deal more than now about the social and economic
have to know a great deal more than they do now about the social and economical
would have to know a great deal more than they do now about the social and economical
would have to know a great deal more than they do now about the social and economic
would have to know a great deal more than now about the social and economical

请问为什么B不对而E对？为什么一定要用WOULD HAVE TO KNOW时态？

作者: qiancheng 时间: 2007-2-17 14:36

It's D.

首先：economic VS economical 排除 economical的所有选项

其次：时态上应该用would have to。

再次：THEY DO 不能省~

欢迎光临国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/forum/)