Question

Cells either divide too fast or at the wrong time, ________ difficult for the body to function ________.

1. A.
   making it; properly
2. B.
   make it; proper
3. C.
   making that; proper
4. D.
   make that; properly

Answer 1

A
现在分词作伴随状语，而且it是形式宾语，真正的宾语是for the body to function，所以用making it；function作为动词，修饰语应用副词，所以用properly。