which school was suitable for their son, the parents visited lots of different primary schools in the city.
A. Finding
B. Being found
C. Found
D. To find
网友回答
A. Finding
B. Being found
C. Found
(答案→)D. To find
解析：句意：为了找到哪个学校适合他的儿子，这对父母看了城市中很多不同的小学。因为是目的状语，只有不定式可以做目的状语，所以选D。