2017届北京市高考英语一轮复习综合练习：73 （含解析）_高考复习指南

2017届北京市高考英语一轮复习综合练习：73 （含解析）

　　C．Convenient

　　D．Expensive．

　　61．In David’s letter, he thinks that

　　A．E-books will come down in price

　　B．E-books do little harm to the environment

　　C．E-books come in various sizes and shapes

　　D．E-books are no better than traditional books

　　62．The main purpose of the letter is to

　　A．provide evidence that e-books are a good idea

　　B．honor the person who invented e-books

　　C．scold publishers for wasting so much paper

　　D．explain how to read e-books

　　“Old wives tales” are beliefs passed down from one generation to another, For example, most of us remember our parents’ telling us to eat more of certain foods or not to do certain things. Is there any truth in these teachings? Some of them agree with present medical thinking, but others have not passed the test of time.

　　Did your mother ever tell you to eat your carrots because they are good for your eyes? Scientists now report that eating carrots can help prevent a serious eye disease called macular degeneration. Eating just one carrot a day can reduce the possibility of getting this disease by 40%. Garlic is good for you, too. It can kill the type of virus that causes colds.

　　Unfortunately, not all of Mom’ s advice passed the test of medical studies, For example, generations of children have been told not to go swimming within an hour after eating. But research suggests that there is no danger in doing so. Do sweets cause tooth problems? Well, yes and no. Sticky sweets made with grains tend to cause more problems than sweets made with simple sugars.