[求助]XY-1-32, 高人伸出援手阿。。。

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.

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

为什么答案是E，但不是D呢

是D, 不要迷信答案...

Economic 偏向经济学, 经济上的这个含义

Economical 更偏向与节约的这个含义, 经济上的含义是很少用的.

E的比较对象也不对称. NOW 跟谁比?