A leading figure in the Scottish enlightenment, Adam Smith’s two major books are to democratic capitalism what Marx’s Das Kapital is to socialism.

1. Adam Smith’s two major books are to democratic capitalism what
2. Adam Smith’s two major books are to democratic capitalism like
3. Adam Smith’s two major books are to democratic capitalism just as
4. Adam Smith wrote two major books that are to democratic capitalism similar to
5. Adam Smith wrote two major books that are to democratic capitalism what

   Answer:

答案应该是E

首先前面的A LEADING FIGURE……， 决定了主句的主语应该是ADAM SMITH， 所以答案锁定在D，E 之间！

一个固定用法：A IS TO B WHAT C IS TO D。