As everybody knows，kangaroos are native______...

As everybody knows，kangaroos are native________Australia and are often regarded as one of Australia’s national treasures.

A．in　　    B．to

C．from 　    D．with

高三英语单项填空中等难度题查看答案及解析

Two-thirds of Australia kangaroos and ______ are native ______the area which_______ dry and desert.

A. dingoes; to, is         B. dingos; on, are

C.dingoes; to ,are          D. dingos; by, is

高三英语单项填空中等难度题查看答案及解析

Alex and Chris, volunteers from Australia, are said _____ our school as they have finished their teaching mission.

A. having left　　　 B. leaving

C. to leave　　　　 D. to have left

高三英语单项填空中等难度题查看答案及解析

The koala is an unusual creature. Native to Australia and a bit bigger than a rabbit, it spends most of its time in eucalyptus trees（桉树），feeding on leaves that are poisonous to nearly every other animal on the planet.

The koala sleeps about 22 hours a day and spends the remainder of its time eating and resting. It might spend 10 minutes a day moving, experts say, usually from one tree to another. It has a soft pad at the end of its spine and extra thick fur on its rear end to make the effort, of sitting more comfortable.

Threats and protective measures

The unique lifestyle of the koala has helped it prosper, but today the cute and iconic creature is facing threats from habitat loss, disease and a changing climate. Koala populations are expected to decline by 50 percent in the next 20 years according to the Australian Museum.

To help protect these animals, which bring in an estimated $1.1 billion to Australia each year through koala-related tourism, an international team of researchers has published the first complete genome（基因组）of the koala. Their hope is that the keys to the marsupial’s（有袋动物）long-term survival might be planted in its genetic code.

“The ultimate goal is that we won’t have to…rescue them from the edge of extinction,”said Rebecca Johnson of the Australian Museum Research Institute in Sydney, who led the work.

“Now we have a really good understanding of the koala genome, and we are in a fantastic position to use that knowledge to help us manage them.”

Early findings

An elementary analysis of the koala’s genome, published in Nature Genetics, has already yielded some interesting findings.

For example, the authors found that, compared to other mammals, the koala’s DNA includes an expansion in the number of genes that encode for enzymes involved in anti-poison. That allows them to have a diet that depends almost entirely on eucalyplus leaves which are unusually high in poison. However, it also means that koalas metabolize（代谢）medicines like anti-chlamydia antibiotics faster than other animals.

The koala genome also revealed why koalas are such famously picky eaters. They are known to consume leaves from just 20 of Australia’s 60 known eucalyplus species. And even when they are in one of their preferred trees, koalas take leaf selection very seriously.

Information waiting to be discovered

Johnson said that the information encoded in the koala’s DNA is already being included in management strategies by conservation groups. However, she said the findings described in the new paper represent the early stages of what can be gleamed from the marsupial’s genome.

“The data is public, and I would love for anyone to start mining it and see what other amazing things they can find,”she said.“Once you have a genome of this quality, the sky’s the limit with what you can do with it.”

1.What can be concluded from the passage?

A. The research on the Koala’s DNA has prevented its extinction successfully.

B. Scientists are trying to rescue Koalas by providing more eucalyptus leaves.

C. Koala’s extinction is being controlled effectively in Australia.

D. Scientists are trying to find a way based on Koala’s gene to save them.

2.According to the passage, which of the following is TRUE?

A. Koalas can digest poisonous leaves thanks to their gene.

B. Koalas are particular about leaves because of their taste.

C. Koalas are being extinct just due to human’s activities.

D. Koalas will move to other continents in order to survive.

3.“The sky’s the limit”in the last sentence most probably means ___.

A. The sky is the restriction

B. The sky is too high to reach

C. There is no limit

D. There is no possibility

4.The passage is mainly about ___.

A. Koala-a Special Creature in Australia

B. scientific research on Koalas

C. scientific efforts to save the Koalas

D. Koala’s Characters and Preference

高三英语阅读理解困难题查看答案及解析

According to official government figures, there are more than twice as many kangaroos as people in Australia, and many Australians consider them pests(有害动物). Landholding farmers say that the country’s estimated 50 million kangaroos damage their crops and compete with livestock for scarce resources. Australia’s insurance industry says that kangaroos are involved in more than 80 percent of the 20,000-plus vehicle-animal collisions reported each year. In the country’s underpopulated region, the common belief is that kangaroo numbers have swollen to “plague proportions.”

In the absence of traditional hunters, the thinking goes, killing kangaroos is critical to balancing the ecology and boosting the rural economy. A government-sanctioned(政府认可的) industry, based on the commercial harvest of kangaroo meat and hides, exported $29 million in products in 2017 and supports about 4,000 jobs. Today meat, hides, and leather from kangaroos have been exported to 56 countries. Global brands such as Nike, Puma, and Adidas buy strong, supple “k-leather” to make athletic gear. And kangaroo meat is finding its way into more and more grocery stores.

Advocates point out that low-fat, high-protein kangaroo meat comes from an animal more environmentally friendly than greenhouse gas-emitting sheep and cattle. John Kelly, former executive director of the Kangaroo Industry Association of Australia, says, “Harvesting our food and fibers from animals adapted to Australia’s fragile rangelands is extremely wise and sustainable. Many ecologists will tell you that there is no more humane way of producing red meat.”

Opponents(反对者) of the industry call the killing inhumane, unsustainable, and unnecessary. Population estimates are highly debatable, they say, but “plague proportions” are biologically implausible. Little kangaroos grow slowly, and many die, so kangaroo populations can expand by only 10 to 15 percent a year, and then only under the best of circumstances. Dwayne Bannon-Harrison, a member of the Yuin people of New South Wales, says the idea that kangaroos are destroying the country is laughable. “They’ve been walking this land a lot longer than people have,” he says. “How could something that’s been here for thousands of years be ‘destroying’ the country? I don’t understand the logic in that.”

Can Australians’ conflicting attitudes toward kangaroos be reconciled(和解)? George Wilson says that if kangaroos were privately owned, then graziers(放牧人)—working independently or through wildlife conservancies—would protect the animals, treating them as possessions. They could feed them, lease them, breed them and charge hunter a fee for access. “If you want to conserve something,” Wilson says, “you have to give it a value. Animals that are considered pests don’t have value.”

Privatization could also help reduce grazing pressures. If kangaroos were more valuable than cattle or sheep, farmers would keep less live-stock, which could be good for the environment. Under this scheme, landholders would work with the kangaroo industry on branding, marketing and quality control. The government’s role would be oversight and regulation.

1.What can be learnt from the first three paragraphs?

A. Kangaroo meat is healthier than other red meat.

B. Global brands make small profits on kangaroos.

C. Kangaroos are more friendly to the environment.

D. Overpopulated kangaroos have become a financial burden.

2.What does the underlined word “implausible” in Paragraph 4 probably mean?

A. Unreasonable. B. Immeasurable.

C. Unquestionable. D. Unchangeable.

3.Which of the following might be the benefit of privatization?

A. The popularity of kangaroo hunting.

B. The reduction in the number of kangaroos.

C. The establishment of more conservation areas.

D. The better management of the kangaroo industry.

4.The passage is written to ________.

A. argue against the killing of kangaroos

B. stress the importance of protecting kangaroos

C. present different opinions on the kangaroo industry

D. provide a solution to the problem caused by kangaroos

高三英语阅读理解中等难度题查看答案及解析

As far as I know, quite a few creatures in this film are not real at all, and a lot of ________ happens is imaginary.

A. what               　　     B. which

C. that                    　 D. where

高三英语单项填空中等难度题查看答案及解析

As we know, knowledge is power and the more you learn,     .

高三英语单项填空简单题查看答案及解析

As we all know, children are our future, and it’s up to us to arm them with the tools to succeed. Sadly, today’s children are sometimes being armed with more dangerous tools like weapons, drugs and gangs in the USA. Once a relatively peaceful environment, many schoolyards of today are becoming unsafe for both students and teachers.

Home schools are available to give you choices. Home schooling provides top-quality education, flexibility and freedom to create your own schedule. At Sunny Home School we believe the choice should be yours.

Thanks to modern technology, home schooling information is becoming readily available across the nation. A recent study by the ITBS (Iowa Tests of Basic Skills) and TAP (Tests of Achievement and Proficiency) shows us that students of home schools do particularly well when compared with the nationwide average. In every subject at every grade level, students of home schooling scored obviously higher than those in public and private schools.

If you’re new to home schooling, you may be asking yourself, “Will home schools really work for my children?”

Fact: A nationwide study using a random selection of 1,516 families found students of home schooling to be scoring, on average, at or above the 80th percentile (百分位的第80位) in all areas, on standardized achievement test. (Note: The national average on standardized achievement test is the 50th percentile.)

Collectively, the staff at Sunny Home School brings 65 years of experience in home schooling curriculum. We’ve placed students in the top 2% of the nation in math and many are successfully moving on to college.

One study found that of the home schooled students, 94% said home education prepared them to be independent persons.

For more home schooling information, call us today toll free at (1800)542-8668.

1.We can learn from the first paragraph that ___.

A. many schools armed their students with weapons

B. violence and crime exist in many schoolyards

C. students use weapons to defend their schoolyards

D. weapons are more dangerous than drugs

2.All of the following are true of home schools EXCEPT___.

A. students are free to choose their courses

B. students do well in their important courses

C. they help students find jobs

D. they help students to be independent

3.The purpose of the passage above is___.

A. to give information about different schools

B. to compare home schools with other schools

C. to suggest a new method of school education

D. to persuade people to choose home schools

4.The passage mainly targets___.

A. students　　 　　 B. parents　 　　 C. teachers　 　　 D. adults

5.In which section of the newspaper can we the passage?

A. Finance 　 　　　 　 B. Science

C. Advertisement　 　 D. Sport

高三英语阅读理解中等难度题查看答案及解析

Whether you're learning English as a second language or are a native speaker who's never had the habit of writing, improving your English composition skills is very important. Knowing your shortcomings and practicing will allow you to write essay that is at first simply grammatically correct, and eventually sparkling with style.1.

2.Look up the definitions of words with which you are unfamiliar. The more words you can use successfully, the more often you'll be able to find the right one for the task at hand -- and the less likely your writing will be simplistic and repetitive.

Ask a friend with good English skills to criticize and correct your writing.3.Rewrite your paper or letter after listening to her advice, making the necessary changes.

Use your word processing software spelling and grammar-check tools to fix simple errors. Whenever you misspell a word, replace it with the correct suggestion and then look at it carefully, noting the differences from how you thought it was spelled.4.Use them.

Think in English while writing if you're a native speaker of a different language. Having to translate in your head slows you down, and can easily lead to errors. Study English grammar if you are having difficulties. Look up the rules whenever you're having difficulties or read a grammar book all the way through. It may be boring, but it's extremely helpful.

Practice writing!5.Every skill requires regular repetition to achieve mastery, whether playing a musical instrument, flying a jet or writing good English prose.

A.The more you write, the better writer you'll become.

B.Broaden your vocabulary by reading as much as possible.

C.Most modern Web browsers also include spell-checking tools.

D.Knowing what you're doing wrong is necessary before you can improve.

E.The more aware you are of your writing, the better your handwriting will be.

F.To achieve this you'll need to read more, ask friends for help, and continually write.

G.Put the symbols on flashcards and memorize them, then write them again and again.

高三英语七选五中等难度题查看答案及解析

I know a little bit about Italy as my wife and I ________ there several years ago.

A. are going     B. had been    C. went          D. have been

高三英语单项填空中等难度题查看答案及解析