GWD 1-32 帮忙确定下答案

冰凌713

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

 

1. have to know a great deal more than now about the social and economic
2. have to know a great deal more than they do now about the social and economical
3. would have to know a great deal more than they do now about the social and economical
4. would have to know a great deal more than they do now about the social and economic
5. would have to know a great deal more than now about the social and economical

答案 是E还是D哦？E里面 they do 能省略吗？各位帮忙确定一下哦

Winterfish

大家讨论很多，选D吧。E里面的economical是个很严重的错误：）

Icanw

Ｄ．　
Ｅ　中ｍｏｒｅ　ｔｈａｎ　ｎｏｗ　比较不对称。

echozx

肯定是D。用排除法，只有economic才是对的，与social相称--这样的话只有A和D。但A里面明显的than now 是不对的，所以是D。

冰凌713

谢谢各位！！~~~