问题补充：
---I have tried very hard to find a way out of the trouble, but failed.
---why not ask Frank for help? You see.
A. No pains, no gains
B. It’s better to think twice before doing something
C. Two heads are better than one
D. A friend in need is a friend indeed
答案：
A. No pains, no gains
B. It’s better to think twice before doing something
(答案→)C. Two heads are better than one
D. A friend in need is a friend indeed
解析：考查谚语：A. No pains, no gains不劳无获， B. It’s better to think twice before doing something 三思而后行， C. Two heads are better than one两人智慧胜一人。D. A friend in need is a friend indeed 患难朋友才是真正的朋友。句意：我想尽办法想找个解决问题的办法，为什么不向Frank求助呢？两人智慧胜一人啊。选C。
