[题目]The environment in my hometown is improving because many trees every year.A.plantB.are plantedC.plantedD.were planted 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】The environment in my hometown is improving because many trees __________ every year.

A.plantB.are plantedC.plantedD.were planted

【答案】B

【解析】

句意：我家乡的环境正在改善，因为每年都种很多树。

考查一般现在时的被动语态。plant种植，动词原形；are planted一般现在时的被动语态；planted过去式或过去分词；were planted一般过去时的被动语态。题干句是一个主从复合句，because引导的是原因状语从句，从句的主语是manytrees，与谓语动词plant之间是被动关系，所以应用被动语态；再由everyyear可知句子时态是一般现在时，所以空格上应该填一般现在时的被动语态，其结构为：am/is/are+及物动词的过去分词，只有B选项符合要求，故答案选B。

练习册系列答案

On Weibo, many netizens (网民) spoke highly of the boy, because he could keep calm in the face of such 【10】 dangerous situation. We should learn from him.

【题目】

Piano Lessons

A very good musician. Doing well in teaching kids for ten years. Your home or mine.

Call Mike at 88675521.

For Sale

Coat for man, size 44, $105, after 7 pm, call 51663259.

Color TV, size 60, $250; MP3 player, $45; Radio, $15. Call 6963749.

Help Wanted

If you can find a few hours during the day to look after 2 school children, please call 86549348.

We are looking for a computer trained secretary. He or she should have experience in working on computers. Call 92568877.

Lost

A yellow bag with a mobile phone and some books was left behind the library. Will the finder come to Class 7, Grade 3?

【1】If you want a musician to teach your kid to play the piano, which number will you call?

A.92568877.B.86549348.C.88675521.D.51663259.

【2】What CAN’T you buy in the second advertisement?

A.A color TV.B.An iPad.C.A radio.D.An MP3 player.

【3】What’s in the lost yellow bag?

A.A mobile phone and a wallet.

B.A mobile phone and some books.

C.Some books and an ID card.

D.Some books and a wallet.

【4】Where can you read this text?

A.In a dictionary.B.In a storybook.

C.In a guidebook.D.In the newspaper.

【题目】 Clouds are an ordinary sight. However, this Dutch artist makes his own.

Berndnaut Smilde creates clouds in locations where nature would never place them. The interior (内部) of a church or museum looks different behind a cloud. And an everyday cloud looks unusual in a castle. The art project explores the beauty of clouds. Each scene lasts only five seconds before it disappears.

The ingredients (成分) for Smilde's clouds: just smoke and water vapor (水蒸气). The artist requires a cold and wet space with no wind. Otherwise the clouds will never form or will fall straight to the ground.

Once a cloud is formed, Smilde will run around it and turn it into a shape about three meters across and 1.8 meters tall. Then, he will step back far enough to take several pictures. Smilde will not stop until he is happy with the results. Usually, he creates a dozen clouds at a time.

Many people are interested in Smilde's project. Some ask him to create clouds for them at a party or a wedding ceremony. Smilde, however, often refuses the invitations. He says he only creates clouds when the setting (背景) offers him something fresh. The artist doesn't just want people to stare in wonder at his clouds. He also wants people to appreciate the transience of life. For the clouds, they exist only for a moment and then are gone forever.

Each creation is "about being at the right place at the right time," Smilde says. "If you are seeing a photo, you have already missed it."

【1】The ingredients for Berndnaut Smilde's clouds include _______.

A.soap and paintB.smoke and water vapor

C.soap and smokeD.paint and water vapor

【2】In what order does Smilde carry out his art project?

a. Form a cloud

b. Take pictures

c. Turn the cloud into a special shape

d. Look for a cold and wet space with no wind

A.a-b-d-cB.a-d-b-cC.d-a-b-cD.d-a-c-b

【3】Smilde often refuses the invitations when people ask him to create clouds for them because _______.

A.the settings they offer cannot provide him with something fresh

B.they are not willing to pay him lots of money for creating clouds

C.the settings they offer are not big enough for him to create clouds

D.the places they offer are not cold or wet enough for him to create clouds

【4】The underlined word "transience" in paragraph 5 probably means"_______".

A.the quality of being pureB.the quality of being large

C.the quality of being long-livedD.the quality of being short-lived

【5】What's the best title of this passage?

A.An EngineerB.A ScientistC.Creating CloudsD.Creating Pictures

【题目】

A. slower B. hardly C. improved D. discovered E. traffic

Don’t Make Me Wait

How long are you willing to wait for a web-page to open? Half a minute? A few seconds?

Internet engineers have 【1】 that even 400 milliseconds are too long for most Internet users.

A millisecond is one thousandth of a second. People 【2】 notice such a small time difference, but it does cause them to stop searching, reported The New York Times. Millions of smart-phones and computers are collecting and sending out information. With so many people downloading maps, sports videos, and news, you can get “【3】jam online”. Meanwhile, users are expecting faster and faster service. If one website is 250 milliseconds 【4】 than another website, then people will visit it less often. That is why technology companies are now competing to be the fastest.

【题目】 We take showers and use the toilet every day to get rid of badly waste. Our brains also need to take a bath every day. How can they do it?

A 2013 study found the answer. Researchers at the LS University of Rochester studied the brains of mice and discovered that they cleaned themselves while the mice slept. A kind of fluid in the brain, called cerebral spinal fluid (CSF, 脑脊液), was found to increase dramatically (显著地) during sleep, washing away waste proteins that had been building up between brain cells in waking hours.

"This study shows that the brain has different functional stales when asleep and when awake," Maiken Nedergaard, the lead researcher, told NBC News. It also explains why we can't seem to think clearly after a sleepless night while a good night's sleep leaves us feeling sharp and refreshed.

Now a new study, published on Oct 31 in Science, digs a little deeper into our brains' self-cleaning procedure. Instead of mice, this time humans were the test subjects.

Researchers at Boston University, US, monitored (监测) the brain waves of 13 healthy adults who were sleeping, using accelerated MRI, which is capable of recording faster changes inside the brain than a regular MRI machine. They found that every 20 seconds, blood flowed out of the brain, making room for a large amount of CSF to come in and "clean". This cycle coincided with(与……一致) the rhythm of the brain's slow waves-an electrical activity that happens when we're in deep sleep.

It's still unknown how these brain activities are connected. But the mere fact that they are connected is exciting enough, since it allows researchers to piece together (拼凑出) possible new explanations for misunderstood diseases.

For example, slow-wave sleep has been proven to play a role in strengthening our memories. This may explain why people with Alzheimer's often have fewer and weaker slow brainwaves. Based on this new study, there could be one more explanation for diseased brains: They are not clean.

Nedergaard, leader of the 2013 study, is also excited about the new findings. "Maybe the most important take-home message is that sleep is a serious thing," she told Scientific American. "You really need to sleep to keep a healthy brain because it links electrical activity to a practical 'housekeeping' function."

【1】When the researchers studied the brains of mice, they found __________.

A.CSF in their brains went down when the mice slept

B.CSF carried away waste proteins in their brain during sleep

C.more waste proteins were produced in their brains when asleep

D.the more CSF was in their brains, the fewer waste proteins were

【2】What did the researchers discover when they monitored human brain waves?

A.The rhythm of the brain was slower than that of CSF.

B.The brains worked more slowly when asleep.

C.Brains were cleaned when blood flowed out.

D.It took 20 seconds for CSF to clean brains.

【3】Which of the following would be the best title for the passage?

A.Connecting Brain ActivitiesB.Cleaning in Your Dreams

C.Having a Good SleepD.Explaining Diseases

【题目】To relax myself, I prefer sports rather than magazines.

A.playing; readingB.to play; to readC.play; readD.to play; read

【题目】 What’s your idea of a perfect mom? In America, moms of the 1950s and 60s in the TV plays were the “perfect” examples. They always made freshly cooked meals and had a tidy house. It was their full-time job to care for the children and the home. It meant that the home was the real center of mothers’ lives. But that was 40-50 years ago. Times have changed, and so have the roles of moms.

In the US, in 1960s, society began to change. The women’s liberation movement(妇女解放运动) caused women to question their traditional and solid roles. And women began leaving their homes to get jobs or go back to school. Society changed in Asia, too. Fifty years later, it becomes normal for mothers to work outside the home without the exception(例外). This is true in both America and Asia.

Mothers today serve as presidents, CEOs, university teachers and airline pilots. In fact, they can be found in every profession(职业). But most people will tell you, their most important job is still being a mom.

【1】判断正误Moms work outside the home in both America and Asia now.

【2】简略回答 Do mothers only work in some special professions today?

______________________________________________________________________

【3】简略回答When did women begin leaving their homes to get jobs in the US?

______________________________________________________________________

【4】简略回答According to the passage, what is the most important job for a perfect mom?

______________________________________________________________________

【5】将划线句译成汉语

______________________________________________________________________

【题目】come, I, our, true, will, believe, dream

____________________________________________________.

试题分类