[解析]
(1)D.主旨大意题.通读全文并根据第一段"A friend is better than wealth,but also is worse than poison in some cases.The above sentence contains two opposite meanings and seems to be unreasonable"朋友胜于财富,但在某些情况下,坏于毒药.上面的句子包含两个相反的含义,似乎不合理.可知,本篇文章主要讲的是我们应该与什么样的人做朋友.故选D.
(2)C.细节理解题.根据第二段"My ideal friend is of course the good one whose goodness is shown below"我理想的朋友当然是好人,其善良如下所示.可知,理想的朋友是指高尚的人.故选C.
(3)B.推理判断题.根据第二段可知,作者认为理想中的朋友应该有许多作者没有的好品质,作者可以向他学习,在他的帮助下作者可以免受所有的困难,因此对作者来说,有很多东西要向他理想的朋友学习.故选B.
(4)A.推理判断题.根据第二段"In a word,all his characters are better than mine.I can follow him as a model.By his precept I am persuaded to go the right way.By his warning I am aware of the danger of doing a wrong action.With his help,I am free from all difficulties."总之,他的所有角色都比我强.我可以效法他.作为他的戒律,我被说服走了正确的路.通过他的警告,我意识到做错事的危险.在他的帮助下 ,我没有任何困难.可知作者确信好朋友对他来说很重要.故选A.