The biology teacher asked the class whether the leaves in spring or in summer． [ ] A．come out B．came out C．will come out D．would come out 题目和参考答案——青夏教育精英家教网—

题目内容

The biology teacher asked the class whether the leaves ________ in spring or in summer．

[　　]

A．come out

B．came out

C．will come out

D．would come out

答案：A
提示：

句意为：“生物老师问同学们树叶是春天发芽还是夏天发芽。”树叶发芽是一个客观真理，所以时态为“一般现在时”。

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Ocean Acidification: 'Evil Twin' Threatens World's Oceans
The rise in human emissions of carbon dioxide is driving dangerous changes in the chemistry and ecosystems of the world's oceans, international marine（海洋的）scientists have warned. "Ocean conditions are already more extreme than those experienced by marine organisms and ecosystems for millions of years," says the latest issue of the journal Trends in Ecology and Evolution. "This emphasizes the urgent need to adopt policies that markedly reduce CO2 emissions."
Ocean acidification, which the researchers call the 'evil twin of global warming', is caused when the CO2 emitted by human activity, mainly burning fossil fuels, dissolves into the oceans. It is happening independently of, but in combination with, global warming. Evidence gathered by scientists over the last few years suggests that ocean acidification could represent an equal -- or perhaps even greater threat -- to the biology of our planet than global warming. More than 30% of the CO2 released from burning fossil fuels, cement production, deforestation and other human activities goes straight into the oceans, turning them gradually more acidic.
"The resulting acidification will impact many forms of sea life, especially organisms whose shells or skeletons are made from calcium carbonate（碳化钙）, like corals and shellfish. It may interfere with the reproduction of plankton species which are a vital part of the food web on which fish and all other sea life depend," he adds.
The scientists say there is now persuasive evidence that mass extinctions in past Earth history, like the "Great Dying" of 251 million years ago and another wipeout 55 million years ago, were accompanied by ocean acidification, which may have delivered the deathblow to many species that were unable to cope with it. "These past periods can serve as great lessons of what we can expect in the future, if we continue to push the acidity the ocean even further" said lead author, Dr. Carles Pelejero, from ICREA and the Marine Science Institute of CSIC in Barcelona, Spain. "Given the impacts we see in the fossil record, there is no question about the need to immediately reduce the rate at which we are emitting carbon dioxide in the atmosphere," he said further.
"Today, the surface waters of the oceans have already acidified by an average of 0.1 pH units from pre-industrial levels, and we are seeing signs of its impact even in the deep oceans," said co-author Dr. Eva Calvo, from the Marine Science Institute of CSIC in Spain. "Future acidification depends on how much CO2 humans emit from here on -- but by the year 2100 various projections indicate that the oceans will have acidified by a further 0.3 to 0.4 pH units, which is more than many organisms like corals can stand," Prof. Hoegh-Guldberg says.
"This will create conditions not seen on Earth for at least 40 million years."
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67. What is the biggest cause of the ocean acidification according to the report?
A. the increase of carbon dioxide emission by human beings
B. The worsening of global warming
C. The disappearance of the world’s forests
D. The decrease of marine life
68. In what way according to the report does ocean acidification affect the majority of marine life?
A. It affects their reproduction          B. It destroys their food chain
C. It affects the growth of their young    D. destroys their habitats
69. Which of the following statements is NOT true about ocean acidification?
A. Ocean acidification has made ocean conditions most extreme in millions of years.
B. Ocean acidification may do more damage than global warming to human and plant life in the long run.
C. Ocean acidification is suspected of having caused mass extinctions of life in past Earth history.
D. The effects of ocean acidification are not now but will be felt in the foreseeable future.
70. From the report we can clearly feel that the situation with ocean acidification __________.
A. is quite optimistic                B. remains well under control
C. looks more than urgent            D. is already out of control

When Emily Beardmore first heard that a trip was being planned by the biology class at Windsor High School, she thought about how much fun it would be.
“I thought it would be a really good experience to go with other friends and teachers to another country in an environment other than a vacation environment,” the 17-year-old girl said.
A few months later, Emily got her chance when she and 14 of her classmates, along with biology teacher Tamara Pennington went to Costa Rica for eight days in late May.
“It was not just a tour,” said Pennington, who organized the trip. “You can go any place in the world on just a tour. This one was really working with the sea turtles (海龟) and practicing conservation(保护). It just seemed like the perfect science field trip for kids who think they want to get into science to see what it's really like to be out in the field and enjoy themselves.”
Emily said her time on the turtle program, which was the focus of the trip, was “crazy.” “We were walking on the beach at night and you can’t see anything—just see a big black dot.” She said with a laugh. “I was not expecting the turtles to be that big.” The turtles are leatherback turtles, which are becoming extinct (灭绝) because their eggs are used as food.
“When they would move their legs while laying their eggs they were really hard to control because they were a lot more powerful than you would imagine,” Emily said.
Once the eggs were collected, the students took them back to a hatchery(孵化场) and dug holes to copy the hole the mother turtle had made and then buried the eggs for the 60 days needed to hatch.
“The experience was so cool,” Emily said. “You go to another country to see what their culture is like and learn what their everyday lives are like. It made me really want to help out my mom a lot more than I do, and value what I have.”
【小题1】What did Pennington consider the trip to be?

A．It was a common tour to a foreign country.

B．It was a journey to practice what students learned.

C．It was to attract students’ interest in science.

D．It was a trip to do practical science activities.

【小题2】From what Emily said on her turtle program, we know that .

A．she was afraid of walking on the beach at night

B．she didn’t dare to catch the powerful turtles

C．she had thought turtles were small animals

D．she got crazy at the sight of turtles at night

【小题3】What did Emily learn from her experience?

A．She learned to be grateful to her teachers.

B．She understood the importance of what she had.

C．She realized the beauty of foreign culture.

D．She knew the importance of everyday life

【小题4】What would be the best title for the passage?

A．Teens Help Fight Turtle Extinction.

B．Teens Take a tour to Costa Rica.

C．Teens Have a Research on Turtles.

D．Teens Learn to be Independent.

单句改错（共10小题；每小题1分，满分10分）

增加：在缺词处加一个漏词符号(˄)，并在此符号下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：每处错误及其修改均仅限一词。

1.Do you want a friend, to who you can tell everything?

2.Visitors will have difficulty find proper hotels during the national holiday.

3.As a matter of fact, I’m involved in outdoors sports frequently.

4.I thought it was no good persuading her to stopping smoking.

5.Children should be made understand the importance of saving water.

6.It was not until I came back he went off.

7.People make choices base on how the products are grown or made.

8.The boy preferred staying at home to go out to play.

9.He failed the biology exam and that was because of he didn’t do well in it before.

10.I bought one such a dictionary as you did yesterday.

When Emily Beardmore first heard that a trip was being planned by the biology class at Windsor High School, she thought about how much fun it would be.

“I thought it would be a really good experience to go with other friends and teachers to another country in an environment other than a vacation environment,” the 10- year-old girl said.

A few months later, Emily got her chance when she and 14 of her classmates, along with biology teacher Tamara Pennington went to Costa Rica for eight days in late May.

“It was not just a tour,” said Pennington, who organized the trip. “You can go to any place in the world on just a tour. This one was practical, really working with the sea turtles and practicing conservation (保护). It just seemed like the perfect science field trip for kids who think they want to get into science to see what it’s really like to be out in the field and enjoy themselves.”

Emily said her time on the turtle project, which was the focus of the trip, was “crazy”. “We were walking on the beach at night and you can’t see anything — just see a big black dot (点),” she said with a laugh. “I was not expecting the turtles to be that big.” The turtles are leatherback turtles, which are becoming extinct because their eggs are used as food.

“When they would move their legs while laying their eggs they were really hard to control because they were a lot more powerful than you would imagine,” Emily said.

Once the eggs were collected, the students took them back to a hatchery (孵化场) and dug holes to copy the hole the mother turtle had made and then buried the eggs for the 60 days needed to hatch.

“It was an amazing experience,” Emily said. “You go to another country to see what their culture is like and learn what their everyday lives are like. It made me really want to help out my mom a lot more than I do, and value what I have.”

1.What did Pennington consider the trip to be?

A. It was a common tour to a foreign country.

B. It was a journey to practice what students learned.

C. It was a trip to do practical science activities.

D. It was to attract students’ interest in science.

2.From what Emily said on her turtle project, we know that _____.

A. she was afraid of walking on the beach at night

B. she didn’t dare to catch the powerful turtles

C. she got crazy at the sight of turtles at night

D. she had thought turtles were small animals

3.Which of the following is NOT true according to the passage?

A. Emily thought the trip being planned by the biology class would be fun.

B. Totally, 16 people went to Costa Rica for the 8-day trip in May.

C. Generally, it takes about 60 days to hatch little turtles.

D. The trip mainly aimed to get fun and rest.

Dr. Glenn Tisman, a cancer specialist, knew his young neighbor, Ray Bateman, had an unusual mind. But he had no idea at the time that 12 - year – old Ray had the ability to become his partner in cancer research.

Ray’s parents remembered that at age four, Ray surprised them by fixing a broken vacuum cleaner（吸尘器）. When he was ten, he speedily constructed the family color television from a kit. Later, he succeeded in assembling（组装） a complex stereo system after two experts had failed to do the job.

When Ray was ten, he convinced his parents to buy him a computer. In a short time, Ray was able to do amazing things with the computer. Ray shared his enthusiasm for computers with Dr. Tisman, who used a computer for his research. The two discussed computers and medicine frequently. Amazingly, Ray understood the biology and chemistry related to Dr. Tisman’s medical research without any previous instruction.

Ray then worked with Dr. Tisman after school. He helped conduct research with the equipment and kept it in working order. The purpose of the research was to test the effectiveness of mixing an old cancer drug with certain vitamins. Ray analyzed patient test results by computer, while Dr. Tisman handled all patient contact. Together, they came up with solid research that helped advance cancer treatment.

In 1988, 14 - year - old Ray went with Dr. Tisman to a meeting of the American Federation for Clinical Research（AFCR）, where Ray presented their initial research findings. Using terminology（术语） beyond the grasp of most kids his age, Ray told the scientists how the new drug mixture caused fewer and milder side effects for cancer patients.

A year later, Ray returned to the meeting to update the findings of his and Dr. Tisman’s research. By then, he had become well - known for his devotion to finding cures for sick patients. Stories about him appeared in hundred of newspapers around the world. He appeared on television newscasts and talk shows.

Ray continued to spend most free hours working with Dr. Tisman. The two began studying the effects of vitamins on babies inside the womb（子宫）. However, Ray’s main interest remained cancer treatment, and he continues his research today.

1.According to the passage, Ray______.

A. is a boy of many gifts

B. is very helpful to his parents

C. learned fast under Dr. Tisman’s instruction

D. stopped working with Dr. Tisman after his success

2.What do we know about Dr. Tisman?

A. He succeeded in finding cures for cancer.

B. He made a new discovery in cancer treatment.

C. He convinced Ray to become a partner of him.

D. He taught Ray knowledge related to his research.

3.What made Ray first known to the medical world?

A. His presentation at AFCR. B. His great skills in computer.

C. His devotion to cancer research. D. His appearance on television newscasts.

4. Dr. Tisman’s research is aimed at ______.

A. providing different cancer treatments

B. proving the effects of vitamins on babies

C. finding the side effects of a cancer drug

D. testing the effectiveness of a new drug mixture

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