Children are to meet with setbacks (挫折) as they grow up so their parents don’t have to w

问题补充：

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

答案：

A. possible

B. due

C. necessary

(答案→)D. bound

解析：考查形容词辨析。句意“孩子在成长的构成中肯定会遇到挫折，因此他们的父母不必担心。”A“可能的”；B“到期的，应得的”；C“必需的”；D“有义务的，受约束的”。be bound to do sth.“一定会做某事”。故选D。