OG 40 正确句子:To develop more accurate population forecasts, demographers would have to know a great deal more than they do now about the social and economic determinants of fertility. 这道题本身不难做,但是我的问题在于OG说比较的是current and conditional knowledge,这个从逻辑上也很好理解,但是在语法结构上,本题是主语比较,宾语比较还是状语比较?按照CWANG前辈在比较之庖丁解牛中的总结A do sth than B do.是主语比较的形式,而这里也是补出了they do,所以有点不好理解了。。。。盼望大家解答哈!