Children are to meet with setbacks (挫折) as they grow up,so their parents
don’t have to worry about it.
A. possible
B. due
C. necessary
D. bound
网友回答
A. possible
B. due
C. necessary
(答案→)D. bound
解析： be bound to某事很有可能会发生，某人应当如何，有法律责任或义务做某事。句意为：孩子们在成长过程中肯定会遇到一些挫折，因此父母们不必为他们担心。