27. What have Americans achieved in environmental protection?

　　A. They have cut car emissions to the lowest.

　　B. They have settled their environmental problems.

　　C. They have lowered their CO levels in forty cities.

　　D. They have reduced pollution through effective measures.

　　28. What is especially important for environmental protection according to the last paragraph?

　　A. Education.

　　B. Planning.

　　C. Green living.

　　D. CO reduction.

　　[2017·四川卷]

　　D

　　With around 100 students scheduled to be in that 9 am Monday morning lecture, it is no surprise that almost 20 people actually make it to the class and only 10 of them are still awake after the first 15 minutes; it is not even a surprise that most of them are still in their pyjamas(睡衣). Obviously, students are terrible at adjusting their sleep cycles to their daily schedule.

　　All human beings possess a body clock. Along with other alerting(警报) systems, this governs the sleep/wake cycle and is therefore one of the main processes which govern sleep behaviour. Typically, the preferred sleep/wake cycle is delayed in adolescents, which leads to many students not feeling sleepy until much later in the evenings. This typical sleep pattern is usually referred to as the “night owl” schedule of sleep.

【近三年高考（2017-2016）英语试题分项版解析：专题15 社会生活、说理议论类（原卷版）】相关文章：

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题11 青少年成长话题指导（教师版）

★ 2017年高考英语二轮复习精品资料：专题16 书面表达（教学案）（教师版）

★ 2014届高考英语一轮复习必修4参考答案（外研版）

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（17）及答案

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题10 旅游探险类话题指导（学生版）

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（12）及答案

★ 2017年高考英语二轮复习精品资料：专题14 阅读理解（押题专练）（原卷版）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题22 自然灾害话题指导（学生版）

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题19 文学艺术话题指导（教师版）

★ 山西省永济市涑北中学高三英语总复习：美文欣赏（2）（Last Respects）