求助：gwd-1-32

liliang252

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

为什么不选C呢？

joe11

economic vs. economical

economic 经济学的

economical 节俭的

【讨论连接】GMAT语法讨论汇总  

GMATCRACKER1983

为什么Ａ　ＧＲＥＡＴ　ＤＥＡＬ　的比较级不是Ａ　ＧＲＥＡＴＥＲ　ＤＥＡＬ　？而是什么Ａ　ＧＲＥＡＴ　ＤＥＡＬ　ＭＯＲＥ？？？？？？？？？？？？？？？

GMATCRACKER1983

这里是不是Ａ　ＧＲＥＡＴ　ＤＥＡＬ　修饰比较级ＭＯＲＥ．而Ａ　ＧＲＥＡＴ　ＤＥＡＬ　本身的比较级是Ａ　ＧＲＥＡＴＥＲ　ＤＥＡＬ？

GMATCRACKER1983

UP~~~~!!!!