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
谁能告诉我C错在那里？正确答案是最后一个
[此贴子已经被作者于2008-9-7 14:02:19编辑过]
作者: AlienX 时间: 2008-9-7 14:07
economical vs. economic: 意思不一樣