they found it _……_（take）their children from activity to prepare for their future.take用什么形式

they found it _……_（take）their children from activity to prepare for their future.take用什么形式
they found it _……_（take）their children from activity to prepare for their future.take用什么形式

they found it _……_（take）their children from activity to prepare for their future.take用什么形式
原形take

took

你漏词了吗？
They found it 【形容词】to take their children........
find it+形容词 to do sth.发现做某事是........的