题目内容

—Haven’t seen you for ages! Where have you been?

—I went to Ning Xia and _______ there for a year, teaching as a volunteer.

A. stayed B. stay

C. had stayed D. am staying

 

A

【解析】

试题分析:句意:—好久不见了!你去哪里了?—我去了宁夏,在那里呆了一年,作为一名教学志愿者。A. stayed逗留,一般过去时; B. stay逗留,一般现在时;C. had stayed过去完成时;D. am staying现在进行时。过去一段时间发生的事,现在已经结束用一般过去时。故选A。

考点:考查谓语动词的时态。

 

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A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Because no light can get out, people can’t see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones.

Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or “staff”, in an object.

Another kind of black hole is called “stellar”(星球黑洞). Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way.

The largest black holes are called “supermassive”(超大质量黑洞). These black holes have masses that are more than one million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.

Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in.

A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole.

When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.

1. The gravity of a black hole may become so strong that light cannot get out when_.

A. the star is going to die

B. special tools are used on it

C. other stars come close to it

D. it is seen from the space telescopes

2.According to the passage, which of the following is NOT true?

A. A black hole can be very tiny but extremely heavy.

B. The gravity of a black hole holds all light in its center.

C. Scientists observe high-energy light through their own eyes.

D. Some small black holes came into being as early as the universe.

3.Which can be inferred from the passage?

A. Every galaxy must have a black hole.

B. A galaxy is the center of the universe.

C. A galaxy consists of a large group of stars and planets.

D. Earth’s galaxy is called the Milky Way.

4.What does the last sentence in Paragraph 5 suggest?

A. Neither the sun nor the earth is as heavy as a black hole.

B. There is only one supermassive black hole at the center of the Milky Way.

C. The supermassive black hole had existed before the Milky Way was formed.

D. There is a reason why the large black holes are called “supermassive”.

5.The last two paragraph mainly focus on the question of _________.

A. what a black hole is

B. how black holes form

C. how big black holes are

D. how scientists know about black holes

 

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The research carried out by the University of Bari in Italy could help clarify hospitals who are charged with wasting money on art and decoration as it suggests a pleasant environment helps patients overcome discomfort and pain.

A team headed by Professor Marina de Tommaso at the Neurophysiopathology Pain Unit asked a group of men and women to pick the 20 paintings they considered most ugly and most beautiful from a selection of 300 works by artists such as Lenoardo da Vinci and Sandro Botticelli. They were then asked to watch either the beautiful paintings, or the ugly paintings, or a blank panel while the team struck a short laser pulse at their hand, creating a sensation as if they had been hurt by a pin. The subjects rated the pain as being a third less intense while they were viewing the beautiful paintings, compared with when considering the ugly paintings or the blank panel.

Electrodes (电极) measuring the brain’s electrical activity also confirmed a reduced response to the pain when the subject looked at beautiful paintings. While distractions(娱乐), such as music, are known to reduce pain in hospital, Prof de Tommaso says this is the first result to show that beauty plays a part. The findings, reported in New Scientist, also go a long way to show that beautiful surroundings could aid the healing process.

“Hospitals have been designed to be functional, but we think that their aesthetic(审美能力) aspects should be taken into account too,” said the neurologist. “Beauty obviously offers a distraction that ugly paintings do not. But at least there is no suggestion that ugly surroundings make the pain worse. I think these results show that more research is needed into how a beautiful environment can reduce suffering.”

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1.According to the first paragraph, people didn’t approve_______________.

A. hospitals spend money on medical equipment

B. hospitals decorate their rooms with works of art

C. hospitals make their environment pleasant to patients

D. hospitals treat patients with works of art

2.How did the researchers make the research?

A. By asking the subjects to listen to music.

B. By requiring the subjects to draw paintings.

C. By ordering the subjects to choose which picture is beautiful and ugly.

D. By aching the subjects’ hands while they are watching paintings.

3.According to the research, when designing a hospital, we should consider its____________.

A. convenient facilities

B. functional operating room

C. pleasing environment

D. bright waiting room

4.The best title for the passage may be__________.

A. Patients Don’t Like Pictures

B. Arts Can Be Used As a Medicine

C. Ugly Patients Feel Less Pain

D. Beautiful Art Can Ease Pain

 

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