Whenever we are in ________, we must never lose ________, but try to think of the way out．

A.the trouble; our heart

B.troubles; hearts

C.trouble; heart

D.trouble; our heart

答案及解析： C

每当我们处于困境时，我们决不丧气，而是尽力想出路。in trouble，lose heart都是习惯短语，trouble和heart都是抽象名词。