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:考察分词用法。The connection与make构成被动关系,所以使用被动形式。固定句型为:it takes sb some time to do sth;这个句型里使用不定式,这里也就是使用不定式的被动语态。