We have learned information about global warming. whether in school ,from TV programs. or by over­hearing the adults around us. The pieces of information and facts are everywhere,but where on earth does global warming come from? How does it relate to our lives? And what can we do to help? Let's check out The Down ­to­ Earth Guide to Global Warming written by Americans Laurie David and Cambria Gordon. In the book ,the concept of sustainability is compared to the love of your pet.“Even though your cat might pee on your bedspread or your dog might chew your favorite shoes. you still keep it. You don't throw it away. The planet is also compared to your messy room and CO2 and temperature “go together like peanut butter and jelly . While a mere one degree increase in world temperature might seem small. a comparison of a popsicle and one you'd have to drink may make your concern for global warming grow. The book. constructed from 100 percent recycled paper and printed with soy inks has a chapter “What you can do to stop global warming .There are tips you might have already known but the book has more interesting ideas. For example, leading an unplugged life for a day or considering your career ambitions in light of climate change. From hydrologist to biofuel engineer. they are careers that are sustainable and can be realized. “Kids are the number one influence on their parents. They are guides of change. said author David. 1.The writer began his article by . A .direct introduction B.asking questions C .giving examples D.giving an explanation 2.What does the word “it refer to in the second paragraph? A .your cat B.your dog C.your bedspread D.your cat or your dog 3.The Down­ to­ Earth Guide to Global Warming is a book which is . A .puzzling B.fantastic C.environmentally friendly D.humorous 4.How many examples did the writer give of the book to tell us how to stop global warming? A .Two. B.Three. C.Four. D.Five.