It took a long time for the connection between body temperature and illness .A. to makeB.

问题补充：

It took a long time for the connection between body temperature and illness .

A. to make

B. to be made

C. making

D. being made

答案：

A. to make

(答案→)B. to be made

C. making

D. being made

解析：根据句型It takes some time to do sth.可排除C和D项。由因为the connection between body temperature and illness和make之间为被动关系，故选B项。