阅读下列材料，回答问题。

材料一：他……30岁左右便收徒讲学，前后从事教育四十多年。相传他有弟子3000人，其中出名的有72人。他提倡“道之以德，齐之以礼”，主张“为政以德”。他有关教育思想和教育方法的许多言论，成为后世传颂的格言。

材料二：他生活在战国末期，是荀子的学生。他强调“法治”，并提出“事在四方，要在中央；圣人执要，四方来效”的理论。

2017年3月22日晚，南方医科大学学生刘某携带长刀闯入陈龙宿舍，欲杀害其室友徐某，陈龙挺身而出保护徐某，却被刘某刺中了心脏，生命永远定格在22岁。回想起陈龙生前点滴，他的家人、邻居、同学在为他点赞的同时，不禁都潸然泪下，惋惜不已。

父亲陈必相：每次放假回家他都会帮爷爷洗脚、洗衣服，也时常教育弟弟要孝敬老人；他努力减轻家庭负担，大学四年都勤工俭学。邻居温雪兰：陈龙总是那个热心帮助别人，不辞辛苦的乖孩子。同学刘华金：生活节俭，几乎没买过新衣服，直到研究生复试前夕才买了一套便宜的正装。

从父亲、邻居、同学的点赞中，你认为陈龙的哪些正能量值得我们去弘扬？

阅读短文，下列问题

B

      Mark Twain was a great writer in America. He wrote many books. He liked telling jokes in his books. People liked reading them very much. And it was full of jokes in his life, too. Mark Twain liked reading. So he often borrowed books from other people. One day, he wanted to borrow a book from his neighbor. His neighbor was a mean man. He didn't want to lend it to Mark Twain. Then he had an idea. He said to Mark Twain, “I have a rule. You will have to read the book at my home. If you want to borrow it from me, you should never take it out." Mark Twain had to read that book at his neighbor's house.

     A month later, his neighbor went to borrow a cropper (割草机) from Mark Twain. Mark Twain said to him with a smile, "I make a rule, too. That is, you must use my cropper in my garden. If you borrow it, you can never take it out either."