A new study from Sweden’s KTH Royal Institute of Technology has found that too much social media exposure actually reduces your ability to process information and depletes your short-term working memory.

Our working memory plays a critical role in our capacity to filter information and remember what is valuable but it is not a limitless resource. Erik Fransén, a professor in Computer Science at KTH and the leader of this new study on social media overload says this can explain why our capacity for processing information begins to fail when we attempt to stuff more information in the working memory.

In fact, when you try to process the information like speech or video, you are going to need partly the same system of working memory, so you are reducing your own working memory capacity. And when you try to store many things in your working in your working memory, you get less good at processing information.

It is the periods of downtime of your brain—preferably disconnected from the distractions of your computer or smartphone—that are needed for memory consolidation and transferring important information to your exposure to new information. Besides, you can empty your mind of thoughts quickly to relax completely, go for a short walk or spend s few minutes listening to music. This will help you improve your capacity to process information and increase your productivity.

【1】What can we learn abut social media overload from Paragraph 1?

A. It distracts our atention.

B. It is beneficial to us.

C. It brings us whatever we want.

D. It keeps us informed of everything.

【2】Why does your capacity for processing information begin fall sometimes?

A. Much of the information is unimportant.

B. You don’t make the most of your brain.

C. You’re less good at processing information.

D. Your working memory is a limited source.

【3】What does the underline word “downtime” in the last paragraph probably mean?

A. Support.

B. Relaxation.

C. Increase.

D. Loss.

【4】Which is recommended to relax your brain?

A. Listening to music for a while.

B. Thinking over things carefully.

C. Taking enough physical exercise.

D. Focusing more on the present.

【题目】结合语境，根据汉语或首字母提示用单词的适当形式填空。
（1）The h of the door is off.
（2）Don't come to the c before you make a careful investigation.
（3）We d Lincoln High School in the baseball game yesterday.
（4）Some chemical are easily a into the bloodstream, while others are not.
（5）The opposition leader c the prime minister to call an election.
（6）How many people (参加) your wedding?
（7）They (怀疑) me of having a hand in the affair.
（8）She (责怪) him for the failure of their marriage.
（9）The air is (污染) so badly in some regions that people could hardly breathe.
（10）Good planning is one of the (特征) of a successful business.

【题目】根据短文内容，选择最佳答案。
The Chinese invented paper in 105 A. D. They mixed the bark of a tree and rags (破布) with water, put a screen into the mixture, and lifted out a thin piece of wet paper. They dried the paper in the sun.
The Chinese kept their secret of how to make paper until a war with Muslims in the ninth century. The art of papermaking soon spread throughout the Muslim world.
The Mayan Indians in Central America and Pacific Islanders also discovered how to make paper, but their knowledge never spread to the rest of the world.
For centuries, all paper was made by hand. Rags were the main material. Then a French scientist discovered that people could make paper from wood, too. Finally, in the eighteenth century. a Frenchman invented a machine to make paper from wood.
（1）Who discovered how to make paper?
A.The Chinese.
B.The Pacific Islanders.
C.The Mayan Indians.
D.All of the above.
（2）When did the Chinese invent paper according to the passage?
A.About 1 ,800 years ago.
B.About 1, 900 years ago.
C.About 2, 000 years ago.
D.About 2, 100 years ago.
（3）How was papermaking introduced into the rest of the world from China?
A.Through wars.
B.Through the Muslims.
C.Through the Mayan Indians.
D.Through the Pacific Islanders.
（4）Which of the following is the best title for this passage?
A.The Invention of Paper.
B.The History of Papermaking.
C.Different Ways of Making Paper.
D.The Invention of a Papermaking Machine.

【题目】结合语境，根据汉语或首字母提示用单词的适当形式填空。
（1） (暴露) to so many advertisements, we can't help being persuaded into buying something we don't really need.
（2）Has the government (宣布) that they will build a new highway to the mountain?
（3）It is said that the children are well (照顾) in the popular primary school.
（4）Finding a solution to this problem is one of the greatest (挑战) faced by scientists today.
（5）Professor White gave the students a speech yesterday and he (结束) his speech with an interesting story.
（6）He works in a sports centre i people how to keep healthy by doing exercise.
（7）The army was well-trained, and had little difficulty d the enemy.
（8）According to the report, the drug is s of causing over 200 deaths.
（9）The doctor is well-known for having c some people of the deadly disease.
（10）Those who can f difficulties on their way to success may keep calm when they really appear.

Choose a campsite which has a campfire pit(深坑). 【2】 If there is no fire pit, set up your own. However, you should be careful not to place the fire pit near your camping tent. When you set up a campfire, make sure that you put the campfire materials in the right order. This can help you make sure that there will be no flying debris(碎片) once you light your fire. Put the light materials first such as paper or dry leaves. 【3】 Finally, make sure that you place stones around the campfire pit. Never burn plastics or other poisonous materials, which will disturb your neighboring

campground guests. It will also significantly pollute the air and promote the risk of fire spreads. 【4】 Use it only when all the other fire-making options fail.

【5】 Before you leave your campsite or before you go to bed, make sure that your campfire is completely out. Leaving fire unattended runs high risks of forest fires and the like.

A. Then, put the wood.

B. Camping can give you a lot of freedom.

C. It needs a certain degree of responsibility.

D. One traditional camp activity is making the campfire.

E. This will ensure that you will be capable of controlling your campfire.

F. Once your campfire is set up, do not leave the flame unattended.

G. Do not use petrol every time you attempt to light your campfire.

1.说明消息来源和自己的意愿；

2.理由和打算；

3.希望获准。

注意：1.词数100左右（开头和结尾已给出，不计入总词数）

2.可以适当增加细节，以使行文连贯。

Dear Peter,

I’m Li Hua, a middle school student from China_____________________________________________________

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Yours sincerely,

Li Hua

Once, Pompeii was a busy city of 22,000 people. It 【2】 (lie) at the foot of Mount Vesuvius, a grass-covered volcano. Mount Vesuvius had not erupted for 【3】 (century), so the people of Pompeii felt that they were in 【4】 (safe).

In August of AD 79, Mount Vesuvius erupted. The entire top of the mountain exploded, 【5】 a huge black cloud rose into the air. Soon stones and hot ashes began to fall on Pompeii. When theeruption ended two days later, Pompeii 【6】(bury) under 20 feet of stones and ashes. Almost all of its people were dead.

From then on, Pompeii remained under stones and ashes. Then an Italian scientist 【7】 (name) Ginseppe began to uncover Pompeii. 【8】 (slow) and carefully, Ginseppe and his men dug. The city looked almost the same as it had looked in AD 79. There were streets and fountains, house and shops. There was a stadium 【9】 20,000 seats. Perhaps the most important of all, there were everyday objects,【10】 tell us a great deal about the people who lived in Pompeii. Ginseppe has died, but his work continues.

【题目】阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
People can often see a talking parrot on a TV show, in a movie, or even in someone's home. The parrot has learned (copy) sounds that people make. Dolphins, bats, and some other animals also copy sounds. Now we can add elephants this list of copycats (盲目模仿者).
Dr. Joyce Poole is an expert,studies the sounds of elephants. While she was in Kenya, she would hear strange noises (make) by Mlaika after sunset. Mlaika was 8-year-old African elephant and it lived near a highway.
Dr. Poole says that she couldn't tell the (different) between Mlaika's call and the (distance) truck noise. Why did it copy the sounds of the trucks driving by? Animals that are able to copy sounds may enjoy (practice) new sounds. When they (keep) outside of their natural environment, they may copy unusual sounds.
So far Dr. Poole (spend) 18 years with two female Asian elephants. Asian elephants make sounds like birds to talk with one another.
Parrots, dolphins, humans, and elephants show that being a copycat is one way that animals and people make new friends and keep old ones.

1.派对时间、地点；

2.派对活动内容；

3.期待他的参与。

注意：1.词数100左右；

2.可以适当增加细节，以使行文连贯。

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（1）This tennis tournament is open to both and professionals.
（2）The flight will be announced soon. , please remain seated.
（3）I have never heard of such a thing. It's very .
（4）I'd like you to be the photo of the magazine.
（5）I can't accept your invitation for a coffee because I have to a report on the big fire last night.
（6）She couldn't attend the meeting so her took her place.
（7）She is a talented musician as well as a .
（8）Marlin went to a new company last month and he is getting along very well with his .
（9）I'm extremely about what I read in the press.
（10）I have a March for the novel; that is to say, it must be finished by March.
（11）A representative of the company will call on you to the damage.
（12）After much delay, the results of the survey were finally on the newspaper.