The Canadian dollar has fallen about 20 perce...

The Canadian dollar has fallen about 20 percent in value, making that dream ski vacation in Whistler Mountains __________than ever.

高三英语单项填空简单题查看答案及解析

The Canadian dollar has fallen about 20 percent in value, making that dream ski vacation in Whistler Mountains __________than ever.

A. seems more within reach                 B. seem more within reach

C. seems within more reach                 D. seem within more reach

高三英语单项填空困难题查看答案及解析

March 21 has been declared World Sleep Day, a time to recognize and celebrate the value of sleep. Many sleep experts hope it will be a wake-up call.

According to a poll (民意调查)by the National Sleep Foundation, nearly 4 in 5 Americans don’t get as much sleep as they should during the workweek. On average, adults are thought to need at least eight hours of sleep a night, although some can manage with less and some won’t do well without more. But the survey found that, on workdays, only 21% of Americans actually get a full eight hours of sleep, and another 21% get less than six.

To many of us, the thought of spending more time sleeping is, well, a big yawn. On the other hand, the thought of being smarter, thinner, healthier and more cheerful has a certain appeal. And those are just a few of the advantages that can be ours if we consistently get enough sleep, researchers say. Also on the plus side: We’re likely to have better skin, better memories, better judgment, and, oh, yes, longer lives.

“When you lose even one hour of sleep for any reason, it influences your performance the next day,” says Dr. Alon Avidan, director of the UCLA Sleep Disorders Center.

A study published last year found the same to be true even of children. When kids aged 8 to 12 slept for just one hour less for four nights, they didn’t function as well during the day.

But sleeping has an image problem. “We see napping or sleeping as lazy,” says Jennifer Vriend, a clinical psychologist in Ottawa, Canada, and the leading author of the study with children. “We put so much emphasis on diet, nutrition and exercise. Sleep is in the back seat.” In fact, she adds, no matter how much we work out, no matter how well we eat, we can’t be in top physical shape unless we also get plenty of sleep.

1.The underlined part in Paragraph 1 means _____.

A.to wake up the sleepers

B.to serve as a morning call

C.to draw people’s attention

D.to declare the special day

2.From Paragraph 3 we can infer that _______.

A.being healthier is one of the advantages for us

B.enough sleep is the guarantee of the appealing things

C.sleeping has nothing to do with one’s expectations

D.spending more time on sleeping is a waste of time

3.What Jennifer Vriend said in the last paragraph implies that _______.

A.people care little about sleeping

B.sleeping is an image problem

C.lazy people tend to sleep long

D.sleeping is only part of our life

4.What is the purpose of the passage?

A.to talk about people’s sleeping problems.

B.to provide an investigation result of sleeping.

C.to stress the function of sleeping at night.

D.to arouse the awareness of enough sleeping.

高三英语阅读理解中等难度题查看答案及解析

How much rain has fallen on the earth in the past? Man has not always kept weather records. Because scientists need a way to learn about past rainfall, they study the tree rings.

A tree’s trunk (树干) keeps growing year by year. Under its bark (树皮), a tree adds a layer of new wood each year it lives. If you look at a tree stump, you can see the layers. They are called annual ring (年轮).

On some trees, all of the rings are of the same width. But the ponderosa(美国黄松) that grows in the American southwest have rings in different withes. The soil in he southwest is dry. The pines depend on rainfall for water. In a year of good rainfall, they form wide rings. In a dry year, they form narrow ones.

Scientists do not have to cut down a pine to study its rings. With a special tool, they remove a narrow piece of wood from the trunk without harming the tree. Then they look at the width of each ring to see how much rain fell in the year it formed.

Some pines are hundreds of years old and have hundreds of rings. These rings are from an annual record o0f past rainfall in the southwest.

1.We could infer from the passage that ______.

2.A tree grows a new layer of wood _____.

3.On the whole, the passage is about _____.

4.The scientists _____ to know how much rain fell in a certain area in the past.

5.Which of he following is true according to the passage?

高三英语阅读理解中等难度题查看答案及解析

The unemployment rate in this city ____ from 7％ to 6％ in the past two years.

高三英语单项填空简单题查看答案及解析

The price of the houses in this district_________from 5% to 7% in the past two months.

A.has fallen        B.has been fallen        C.was fallen        D.was falling

高三英语单项填空简单题查看答案及解析

The unemployment rate in this district________from 6% to 5% in the past two years.

高三英语单项填空中等难度题查看答案及解析

Since the new prohibition of drunk driving_____, the number of accidents in the area has fallen sharply.

A. has been introduced　 B. introduced

C. was introduced　　 D. has introduced

高三英语单项填空中等难度题查看答案及解析

Since the new speed limits ______，the number of accidents in the area has fallen strikingly．

A． were introduced

B． introduced

C． have been introduced

D． have introduced

高三英语单项填空中等难度题查看答案及解析

The number of sharks has fallen greatly in the past three years, so measures must be taken to oppose ________ sharks illegally.

A．people to hurt                         B．people from hunting

C．people hurt                            D．people’s hunting

高三英语单项填空简单题查看答案及解析