[解析]
(1)D.推理判断题。根据空前"As a person who is graduating from high school very soon,I have some suggestions for students in high school or students who are soon going to be high school students."(作为一个即将高中毕业的人,我有一些建议给正在上高中或即将成为高中生的学生。)可知作者要给即将进入高中的同学一些建议。再根据横线后句"I am sure others can benefit from reading them and will not make similar mistakes like me"(我相信别人会从阅读中受益,不会像我一样犯类似的错误。)可知,这些建议对未来的高中生很有好处。可知这些建议是我在高中的教训总结而来的。所以"D.Many of these are based on regrets that I have.(其中很多都是基于我的遗憾。)"符合语境。故选D。
(2)A.标题归纳题。根据本段倒数第二句"Although something seems bad at the first impression,it does not mean it is bad all the time."(虽然一些事情在第一印象中看起来很糟糕,但这并不意味着它一直都很糟糕。)可知很多事物咋一看很不好,但并不意味着它总不好。也就是说我们不要过于迅速地做出判断。所以"A.Do not be too quick to judge.(不要太快做出判断。)"符合语境。故选A。
(3)F.推理判断题。本段第一句"Don't try to please everybody."(不要取悦所有人)。因为不是所有人都喜欢你。F项"Don't spend any effort trying to please others who will never like you.(不要试图取悦那些永远不会喜欢你的人。)"与本段中心思想一致,且和后句"It is a huge waste of time."一致。故选F。
(4)C.推理判断题。根据横线后句"Don't argue with them and just obey them."(我们不要和老师争吵也不要完全服从他们。)也就是说要有我们自己的思考和判断。所以"C.Listen to their advice and consider it carefully.(倾听他们的建议并仔细考虑。)"符合语境。故选C。
(5)G.推理判断题。根据横线前句The real world isn't a closed environment.(真正的世界不是一个封闭的环境。)接下来要说真正的世界是一个我们要为自己的行为负责任的地方。所以"G.It is a free society where people accept responsibility for their actions.(这是一个自由的社会,人们对自己的行为承担责任。)"符合语境。is和isn't对应。故选G。