_______environmental damage is done, it takes...

_______environmental damage is done, it takes many years for the ecosystem to recover.

A．Even if            B．If only            C．While            D．Once

高二英语单项填空中等难度题查看答案及解析

_______environmental damage is done, it takes many years for the ecosystem to recover．

A．Even if                B．If only                 C．While                  D．Once

高二英语单项填空中等难度题查看答案及解析

_______environmental damage is done, it takes many years for the ecosystem to recover．

高二英语单项填空简单题查看答案及解析

Once environment damage ________, it takes many years for the government to recover.

A.has done B.is to do C.does D.is done

高二英语单项填空中等难度题查看答案及解析

Often we take for granted the many household items we use every day. It is difficult to imagine there was a time in the past when these inventions did not exist. Actually, several of the most common inventions have been with us for quite some time. Inventions like toothbrush, contact lenses（隐形眼镜）, and credit cards came into use long ago.

The first toothbrush was introduced in China in the late 1400s but it was only 300 years later that this simple tool came into common use in Europe. By the nineteenth century, a variety of paste and powder cleaners were available throughout Europe as dental(牙齿的) care became more widespread. The first tube of toothpaste hit the market in Great Britain in 1891.

There is evidence to show that the first contact lenses were actually suggested by an astronomer, Sir John Herschel, in 1827. However, SirJohn Herschel was never able to create a working model of his idea. It was not until 1887 that a Swiss doctor from Zurich, Dr. Eugen Frick, came up with a workable process for producing precision (精密)lenses. Dr. Frick designed a new method for producing contact lenses,and the Zeiss factory in Germany  began to produce contact lenses.

Credit cards have also been available for many years. They have been in use in the United States since the 1920s. At first, these cards were only used to buy gas in the quickly growing automobile service industry. Then, in the 1950s, Diners Club introduced the first general-purpose credit card. Today, credit cards such as Master Card, Visa, and American Express are commonly used by travelers around the world.

While it may be true that some of the greatest inventions and discoveries in history came about by chance, the majority of inventions that simplify our lives today came about through careful research and patient study. Of course, it still holds true that even with all the comforts of modern technology, inventors continue to search for ways of helping all of us get out of doing those necessary but tedious (乏味的) tasks which we still face. As the old saying goes, “Necessity is the mother of invention.”

1.From the second paragraph we can learn that _____.

A. toothbrushes came into common use in Europe in the 17th century

B. people could enjoy a variety of paste and powder cleaners in the 18th century

C. more and more people paid attention to dental care throughout Europe in the 19th century

D. the English could use different kinds of tubes of toothpaste in the early 19th century

2.All of the following made a contribution to the invention and use of contact lenses EXCEPT _______.

A. Diners Club                       B. Sir John Herschel

C. Dr Eugen Frick                    D. the Zeiss factory

3.Which of the following statements is TRUE according to the fourth paragraph?

A. Credit cards have a history of about two hundred years.

B. Three kinds of credit cards are being used in the USA.

C. The use of credit cards is closely related to the economic development.

D. American Express is only used by American travelers now.

4.The last paragraph mainly tells us that ______.

A. the greatest inventions came about by chance

B. inventions came about through careful research and patient study

C. inventors still continue to make inventions

D. necessity is the mother of invention

高二英语简单题查看答案及解析

For many years there’s been a debate about rewarding our children. Does it work? Is it effective?

Some people think we should establish a standard with our kids and give them something for meeting this standard as a reward. Punishment is given out in much the same way, but it’s used when certain standards of performance, behavior, etc. have not been met. Kids will often become more dutiful when threatened with punishment, and work harder when promised a valuable reward. The problem is what happens when you aren’t around.

To develop responsible, self-disciplined kids, parents need to promote certain ideas. One of these ideas is that everyone pitches in and helps in your family. Another idea is that there can be enjoyment in doing any task if we choose to make it so. When a task is for a worthy cause ( our family can enjoy the house more because I helped clean it), this message can have a big impact.

This is how we help our kids develop a sense of responsibility. When our children develop this responsibility, they’ll be more disciplined, and they’ll control their emotions better. When we give rewards to our kids, we reduce the sense of responsibility. We also create children who may temporarily perform to a certain standard, but who aren’t likely to continue the performance without the carrot hanging in front of them.

“Rewards and punishment can change behavior for a while, but they cannot change the person who engages in the behavior,” said Alfie Kohn, author of Punished by Rewards. “Good values have to be grown from the inside out.” Parents can help give their children a sense of shared responsibility and discipline which can last a life time. The real rewards that your children receive will be their readiness for the complex and demanding world that waits for them—a world that rewards those who have learned the secrets of discipline responsibility. So keep those shiny rewarding to yourself, and let your kids find their own rewards.

1.According to the passage, when children are threatened with punishment, ______.

A. they may lose interest in their work

B. they may appear to be well-behaved

C. they may change to another person

D. the results will be worse than usual

2.What can we know from Paragraph 3?

A. Parents should promote certain ideas to help children develop.

B. Children should be responsible for their discipline.

C. Children should help build a good family atmosphere.

D. No children will adapt to society without their parents’ help

3. The underlined part “the carrot” in Paragraph 4 probably refers to _____.

A. rewards     B. aims     C. apologies    D. doubts

4.According to the passage, Alfie Kohn would agree that parents should ______.

A. never pay attention to the way their children do things

B. show their children how to behave by example

C. never punish their children

D. help their children establish good values

5.What’s the best title for the passage?

A. Do you often reward your children?

B. Should parents reward their children?

C. When should parents reward their children?

D. What can parents reward their children with?

高二英语阅读理解中等难度题查看答案及解析

Many awful facts have shown that it is totally wrong to 　 environmental protection when we develop economy.

A. adjust　　 B. ignore　　 C. advocate　　 D. improve

高二英语单项填空中等难度题查看答案及解析

Cloning humans has been _____ in the science world for many years and it is likely to continue .

A. ridiculous　　 　 B. contemporary

C. controversial　　 D. contradictory

高二英语单项填空中等难度题查看答案及解析

He never thought of it before, ________all that his parents had done for him for granted.

A.taking   B.taken    C.to take D.took

高二英语单项填空简单题查看答案及解析

I never thought of it before, _______ all that my parents had done for me for granted.

A. taking　　　 B. taken　　　　　 C. to take　　 D. Took

高二英语单项填空中等难度题查看答案及解析