问题补充：
They will not even if they can’t win the match.
A. lose their hearts
B. lose their heart
C. lose the heart
D. lose heart
答案：
A. lose their hearts
B. lose their heart
C. lose the heart
(答案→)D. lose heart
解析：考查短语。lose heart丧失信心，丧失勇气。如果heart前加上冠词或者其它限定词则表示失去了心脏。句意：即使他们不能赢得比赛，他们也不回丧失信心。故选D。
