问题
选择题
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
D
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。