依次填入下面一段文字横线处的语句，衔接最恰当的一组是（   ）

善良，生命对生命的同情，多么普通的品质，今天仿佛成了稀有之物。中外哲人都认为，            ，            。            ，            。            ，           。由此下去可以干一切坏事，成为法西斯，成为恐怖主义者。善良是区分好人与坏人的最初界限，也是最后界限。

①是人类全部道德的基础

②就是从同情心的麻木和死灭开始的

③没有同情，人就不是人

④同情是人与兽的区别的开端

⑤人是怎么沦为兽的

⑥社会就不是人呆的地方

Dear Sir or Madam.

    One of the teachers at my school in New York tells me that your school has summer course. I am planning to go to Beijing next summer and would like to take a short one-month course.

    I am 18 years old and have been studying Chinese for six years. I was born in the USA and have never been to China before. I am going to study Chinese at the university. I think the course will help me improve my Chinese.

    Could you send me a catalogue(目录) and application form (申请表)? I would also like information about Beijing and other places nearby. I hope to do some travelling when the course is over.

    Thank you! I am looking forward to your reply

Very truly yours,

Jim Green