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
答案是E,但是我一开始就把BCE都排除了,economical不是节约的意思吗?这和economic还是有区别的,句子中的意思应该用economic 吧, 一开始我选D,但照答案来看的话they do不应该补上,为什么呢 ![](/static/legacy-emoticon/Dvbbs/em06.gif) |