根据下面短文内容，在短文的空格处填上一个恰当的词，使短文完整、通顺。
每空一词，含缩略词。
It's hard to find a true friend . For most of the time , you may think you can believe（相信）someone , later he may let you down（失望）.
When you have some difficult times , a true friend will always be there for you . Through good times or____ times , they will try to help you and make you laugh . They will understand you____ you did something wrong . A friend will bring new and exciting things to your life and make your life more interesting .
True friends will keep your secrets（秘密）and they believe you can also keep____ secrets . When you talk to a true friend , you don't have to worry____ what you may say . You can enjoy this freedom（自由）only with friends .
However , Friendship is like a two-way street . To find a true friend , you may do the____ thing as your friend does , too . Help your friends when they have problems and share the good things____ them . Give them the same things they give to you . Sometimes friendship breaks very quickly if only one person is giving and trying to keep it .
There is an old____ , “ Friendship makes the hearts of all the world together ” . You will____ that there is nothing better than having a true friend by your side to share life with .
