Jack failed again in the final exam but he didn’t heart.A. missB. loseC. hurtD. keep

问题补充：

Jack failed again in the final exam, but he didn’t heart.

A. miss

B. lose

C. hurt

D. keep

答案：

A. miss

(答案→)B. lose

C. hurt

D. keep

解析：lose heart意思为：失去信心。