gwd-1-32

TakeItEasy1

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

joe11

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Your answers are inside.

ruirui_hsu

答案是 D