The professor was delighted to find that two thirds of the projecthad already been finished by the students independently．教授高兴地发现学生们已独立完成了该项目三分之二的工作．题目和参考答案——青夏教育精英家教网—

题目内容

3．The professor was delighted to find that two thirds of the projecthad already been finished by the students independently．（finish）
教授高兴地发现学生们已独立完成了该项目三分之二的工作．

分析 "教授发现…"这一动作发生在过去，而学生完成工作应该在"发现"之前．所以发生在"过去的过去"，故应用过去完成时．又由于project和finish之间是被动关系，所以应用过去完成时的被动语态．

解答 had （already） been finished

点评考查语态和时态，要根据句子中的关键动词或时间状语判断．

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Eyesight plays a very important role in our daily life. Every waking moment, the eyes are working to see the world around us. Over forty percent of Americans worry about losing eyesight, but it's easy to include steps into our daily life to ensure healthy eyes. Here are five suggestions for a lifetime of healthy eyesight：

·Schedule yearly exams. 1. Experts advise parents to bring babies 6 to 12 months of age to the doctor for a careful check. The good news is that millions of children now can have yearly eye exams and following treatment, including eyeglasses.

·Protect against UV rays (紫外线). Long?term stay in the sun creates risk to your eyes. No matter what the season is, it's extremely important to wear sunglasses. 2.

·3. Two thirds of Americans spend up to seven hours a day using computers or other digital products. This frequent eye activity increases the risk for eye tiredness. Experts recommend that people practice the 20/20/20 rule: every 20 minutes, take a 20?second break and look at something 20 feet away.

·4. As part of a healthy diet, eat more fruits and vegetables each day. Vitamins (维生素) C and E help protect eyesight and promote eye health.

·Practice safe wear and care of contact lenses (隐形眼镜). Many Americans use contact lenses to improve their eyesight. While some follow the medical advice for wearing contact lenses, many are breaking the rules and putting their eyesight at risk. 5. Otherwise, you may have problems such as red eyes, pain in the eyes, or a more serious condition.

A．Give your eyes a break.

B．Parents usually don't care about their own eyesight.

C．They can properly protect your eyes.

D．Stay in good shape by taking more vitamins.

E．Have your eyes checked as early as possible.

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4.A. sign B. smile C. action D. sound

5.A. willingly B. completely C. quietly D. loudly

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20.A. lesson B. gift C. message D. advice

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Ever since the invention of the printing press over 500 years ago, mass communication has been growing and affecting the way communities and people behave. Where once the written word was used by those with power to keep control of populations, now everyone believes that they have power over governments because of the huge amount of knowledge available to them thanks to electronic communication. At every stage of the development of communication, from the telegraph through to the Internet, societies have had to adapt to its effects. But have the effects been more positive or negative?

The saying “knowledge is power” has been an excellent motivator for people to improve their lives, but today the massive amount of information available through the Internet doesn’t always seem to be helping people in the way we’d hoped. Rather than improving people’s lives and bringing us closer together, the information age is making us more divided and irresponsible.

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