根据句意及首字母提示填空。

预防违法犯罪，交友警钟长呜。预防未成年犯罪保护法中指出，未成年人犯罪的主要原因之一是交友不慎，崇尚哥们儿义气，易于拉帮结派、组成小团伙。这启示我们（    ）

①与朋友交往时要坚持原则                ②哥们儿义气不是真正友谊

③与朋友交往时要志趣相投                ④慎重交友有利于健康成长

    Do you like sports? Do you play basketball or baseball in your P.E. class or after school?

    My sister and I like sports very much. (A) We are in our school tennis club__俱乐部）.We play tennis in the morning. It's very interesting. First, we do some exercises(热身练习）.Then, the teacher teaches tennis. We watch him carefully. Later, we play in pairs. Some boys can play very well，but we can't. They often come to help  us. Our teacher is glad to see this. He says our school has many clubs. “Do you like sports?” “Yes，we do, we answer.

    Sports are really fun, and they are good for us.

根据短文内容完成下列任务。

湖泊数量的减少对生态环境的影响是（  ）
①调蓄洪水的功能削弱；②湖水的减少可减轻当地的洪涝灾害；
③使水生生物数量、种类减少；④可减小大气湿度，进而影响到局部地区气候

为纪念中国历史上的一位杰出人物，孙中山曾写下“中华开国五千年，神州轩辕自古传”诗句．***也写了“聪明睿智，光被遐荒，建此伟业，雄立东方”以纪念此人，两位伟人共同纪念的人物是（    ）