listen-they go outside and freeze to death.Worried about his son，Jack decides to find Sam although there are very dangerous storms.Meanwhile，people in the rest of the country are told to head south as far as possible.

　　Jack takes a dangerous journey and finally finds Sam.All of the people that stay in the library are safe.Soon the storm is over and the sun appears.More and more people are found alive.It is a miracle．

　　This is an inspiring book that reminds people about the results of global warming and the importance of environmental protection.Are we doing enough to protect the world we live in? This book is suitable for all ages and for anyone who enjoys adventure，excitement and suspense (悬疑)．

　　【语篇解读】　　本文是一篇说明文，介绍了一部以地球环境为主题的小说--《后天》。

　　1. The text is talking about a ．

　　A．film　　　　 B．scientist

　　C．book D．writer

　　C　[细节理解题。根据文章第一段"Written by Whitley Strieber，this novel..."可知，文章介绍的是一本书。]

　　2. How do Sam and his friends survive?

　　A．They keep warm by burning books in a library.

　　B．They go outside to find a way out.

　　C．They ask Sam's father for help.

　　D．They encourage each other.

　　A　[细节理解题。根据文章第三段首句以及第四段第二句可知，Sam和他的朋友之所以幸存下来是因为他们在图书馆烧书取暖。]

　　3. The underlined word "miracle" in the fourth paragraph means ．

　　A．something interesting

　　B．something frightening

　　C．something shocking

D．something amazing