问题
选择题
It is easy to be grateful for the good things, ______ a life of rich fulfillment comes to those who are also thankful for the setbacks.
A．that
B．which
C．while
D．when
答案
答案：C
题目分析：句意：感激美好的事物简单，然而，有成就的人生属于那些感恩挫折的人。此处while是并列连词，前后是对比关系。故选C。