一个较难的英语完形填空（1个空）,高手帮忙
问题描述：
一个较难的英语完形填空（1个空）,高手帮忙
In dealing with many challenges that friendship will bring to you, try to see them for（50） what they are：small hurdles you need to jump or get through on your way through life. Nothing is so big that it is impossible to get over, and hurt only （53）to make us stronger. It is all part of growing up, it happens to everyone, and some day you will look back on all of this and say, “Hard as it was, it make me who I am today. And that a good thing.”
53、A：serves B：means C：aims D：attempts
答案是A,我想知道原因和serve的意思,其余的为什么不对呢?高手帮忙
答
选A是因为hurt only serves to make us stronger意思是（在成长过程中）“这类伤害只会使我们更加强大”.
这里serve的意思是“对……有用”,这是一个较生僻的词义.很明显其他选项都没有这个意思