Increasingly, Americans are becoming their own doctors, by going online to diagnose their symptoms, order home health tests or medical devices, or even self-treat their illnesses with drugs from Internet pharmacies(药店). Some avoid doctors because of the high cost of medical care, especially if they lack health insurance. Or they may stay because they find it embarrassing to discuss their weight, alcohol consumption or couch potato habits. Patients may also fear what they might learn about their health, or they distrust physicians because of negative experiences in the past. But playing doctor can also be a deadly game.

Every day, more than six million Americans turn to the Internet for medical answers – most of them aren’t nearly skeptical enough of what they find. A 2002 survey by the Pew Internet & American Life Project found that 72 percent of those surveyed believe all or most of what they read on health websites. They shouldn’t. Look up “headache”, and the chances of finding reliable and complete information, free from a motivation for commercial gain, are only one in ten, reports an April 2005 Brown Medical School study. Of the 169 websites the researchers rated, only 16 scored as “high quality”. Recent studies found faulty facts about all sorts of other disorders, causing one research team to warn that a large amount of incomplete, inaccurate and even dangerous information exists on the Internet.

The problem is most people don’t know the safe way to surf the Web. “They use a search engine like Google, get 18 trillion choices and start clicking. But that’s risky, because almost anybody can put up a site that looks authoritative(权威的), so it’d hard to know if what you’re reading is reasonable or not,” says Dr. Sarah Bass from the National Cancer Institute.

1. According to the text, an increasing number of American _____.

2. Some Americans stay away from doctors because they _____.

3.According to the study of Brown Medical School, ______.

4. Which of the following is the author’s main argument?

假设你是李华，你的澳大利亚朋友Dick听说中国的中小学正在减轻学生的学习负担，来信询问有关情况。请你根据下表提供的信息，写一封回信，谈一谈减负给你的学习和生活带来的变化。

周末活动（减负前） 周末活动（减负后）

白天：上课、做作业 白天：参观博物馆，学习电脑、绘画等

晚上：做作业 晚上：看新闻、读书、看报

就寝时间：11:30 就寝时间：10:30 

注意：1.词数100左右。2.开头已为你写好。

生词：reduce learning load减轻学习负担

Dear Dick,

　　How nice to hear from you again.

...

Best wishes,

Li Hua

It sounds like a good idea, but it _________ to be seen whether it will succeed.

 Without the air to hold some of the sun’s heat, the earth at night _____ too cold for us to live.

 At the back of the book _______ of the works available for further research.

 It _______ that I had forgotten to lock the door this morning before I left home.

Which one of the following answers is NOT suitable? ________

 _______ the fact that three quarters of the earth’s surface is covered with water, we can say that it is a ________ planet.

 The team trained hard _______ they could win the match this year.

At that moment of failure, he didn’t lose confidence, instead, _____ to try it again.

It is obviously that his parents didn’t teach him good _______.