问题补充:
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:
A. that
B. which
(答案→)C. while
D. when
解析: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。