15.Without confidence there is no friendship. 没有信任，就没有友谊。——Epicurus

　　16.A friend indeed is a friend in need.患难见真情和患难之交才是真正的朋友.

　　17.Be slow in choosing a friend, slower in changing.---Benjamin Franklin, American pesident 选择朋友要谨慎，换朋友更要谨慎。 ---美国总统 富兰克林

　　18.Be slow in choosing a friend; slower in changing. 选择朋友要审慎，摒弃更要审又慎。

　　19.Because friendships enhance our lives,it is important to cultivate them. 培植友谊十分重要，因为友谊能提高生活的价值。

　　20.Betraying a trust is a very quick and painful way to terminate a friendship.---Ralph Waldo Emerson, American thinker 背信弃义会迅速而痛苦地断送友谊。---美国思想家 爱默生

　　21.A man should keep his friendship in constant repair. ---Samuel johnaon, British writer 人应该经常维修友谊。 ---英国作家 约翰逊

　　22.A true friend is for ever a friend. ---Grorge Macdonald, British novelist 真正的朋友是永远的朋友。

　　23.Admonish your friends privately, but praise them openly. 告诫朋友要在私下里，但是夸奖朋友要公开。

　　24.Animals are such agreeable friends --they ask no questions, they pass no criticism. ---George Eliot, British novelist 动物是极易相处的朋友，它们不提问，也不批评。 ---英国小说家 艾略特

　　25.Do not speak of your happiness to one less fortunate than yourself. 不要向不如你幸福的人说你自己的幸福。 ——Plutarch

　　26.Don’t ask others to also do not allow others to do the dirty things, as a principle of friendship既不请求别人也不答应别人去做卑鄙的事情，为友谊的一项原则。 --(古罗马)西塞罗

　　27.Long together share sb.’s joys and sorrows together, in order to have friends with complete mutual understanding长期在一起同甘共苦共患难，才能有莫逆之交。 --(古罗马)西塞罗