问题补充：
It is important to learn to take a positive attitude life when you are trouble.
A. to; under
B. of; in
C. to; in
D. with; in
答案：
A. to; under
B. of; in
(答案→)C. to; in
D. with; in
解析：考查介词，固定词组，对……态度用介词to，be in trouble意思“有困难”，句子意思“当你处于困难时对于生活要学着采取积极态度很重要”，所以选C
