Although she was hurt by her husband ,she tried to ______ he

Although she was hurt by her husband ,she tried to ______ her feeling .
A.cover
B.hurt
C.show
D.hide
答案是选D,但我选的是A,cover 为什么错?
谁能给我解释一下为什么选A不行,为什么选D可以.
—— 一个“勤勤恳恳”的初三学生~
看了前三个回答.我想问一下,cover 覆盖 掩藏 hide 隐藏,在题中好像都说的通.能不能再解释的具体点,顺便问一下hide one's felling是不是专门搭配的词组啊.