Most people are afraid of sharks，but they usually do not know very much about them．For example，there are 350 types of sharks，and all of them are meat eaters．Some sharks are very big．
The whale shark is 50 to 60 feet long．But some sharks are very small．The dwarf（侏儒）shark is only 6 inches（英寸）long．Sharks are 100 million years old．In fact，they lived at the same time as dinosaurs．Today，sharks live in every ocean on the earth，but most sharks live in warm water．They keep the oceans clean because they eat sick fish and animals．Most sharks have four to six rows of teeth．When a shark's tooth falls out，another tooth moves in from behind．Sharks do not have ears．
However，they "hear" sounds and movements in the water． Any sound or movement makes the water vibrate． This helps sharks find food． Sharks use their large eyes to find food，too． Most sharks see best in low light． They often hunt for food at dawn（黄昏），in the evening，or in the middle of the night． Scientists want to learn more about sharks for several reasons． For example，cancer（癌症）is common in many animals，including people． However，it is rare（罕见的）in sharks． Scientists want to find out why sharks almost never get cancer． Maybe this information can help people prevent cancer，too．
（1）According to the text，most sharks live ．
| A． |
in very deep water |
| B． |
in warm water |
| C． |
near the surface of the ocean |
| D． |
in cold water |
（2）Sharks keep the oceans clean because they ．
| A． |
do well in cleaning water |
| B． |
eat sick fish and animals |
| C． |
can get cancer like human |
| D． |
can produce a kind of chemical |
（3）What does the underlined（划线的）word "vibrate" mean in Chinese？
| A． |
振动 |
| B． |
停止 |
| C． |
变清澈 |
| D． |
变浑浊 |
（4）According to the text， we know ．
| A． |
the whale shark is 50 to 60 feet long |
| B． |
the dwarf shark is only 6 feet long |
| C． |
sharks and dinosaurs lived in different times |
| D． |
sharks only use large eyes to find food |
阅读下面的短文，然后从每小题所给的A． B、C． D四个选项中，选出最佳选项．
There are countless myths（神话） to explain how the world came to have a moon to bring light to the night time． But now there is a plan for a man﹣made moon． It will give us far more light than the natural Moon．
China is preparing to put a man﹣made moon in the sky above Chengdu by 2020． It will reflect sunlight back onto the Earth． If it succeeds， three more such objects will be sent out in 2022， according to Wu Chunfeng， a space scientist． Wu said it would be similar to how we get moonlight， but he predicted that the man﹣made moon would have eight times the brightness of the real one． "This is because the object will be about 500 kilometers above the Earth． That will make it a lot closer to us than the Moon， which is over 380，000 kilometers away，" Wu added．
If the plan works， the man﹣made moon will save a lot of power．Scientists predict that Chengdu could save around 1.2 billion yuan in electricity every year if a new moon lit up 50 square kilometers of the city．And in 2022， four man﹣made moons can take tuns to work as they will not always be in the best position （位置） relative to the Sun． Together， they can give light to an area of up to 6.400 square kilometers on the Earth for 24 hours． That means its brightness will be seen in most areas in China， reducing the need for streetlights．
（1）Above which city is China preparing to put a man﹣made moon in the sky by 2020？
A． Bejing．
B． Shanghai．
C． Chengdu．
D． Wuhan．
（2）The underlined word "reflect" in Paragraph 2 means" "．
A．吸收
B．反射
C．照耀
D．覆盖
（3）The man﹣made moon will be about above the Earth．
A．500 kilometers
B．380，000 kilometers
C．50 kilometers
D．6，400 kilometers
（4）What can we learn from the passage？
A． The man﹣made moon will be as bright as the natural one．
B． The man﹣made moon will work similarly to the natural one．
C． The man﹣made moon has already lit up the city of Chengdu．
D． The man﹣made moonlight will cover the whole China．
（5）Which part of a newspaper may this passage be from？
A． Culture．
B． Sports．
C． Education．
D． Science．
阅读下面的短文，然后从每小题所给的A、B、C、D四个选项中，选出最佳选项．
In the last passage we've already talked about some dangerous plants， but we don't want to give anyone the wrong idea． The truth is that some plants can hurt you， but most are completely harmless． In fact， there are plenty of plants that are actually very useful to humans．
That is why plants are so popular in Chinese medicine． Chinese medicine has been using plants for at least 4，800 years． One of the most popular plants in Chinese medicine is ginseng（人参）．Doctors of Chinese medicine believe that ginseng can help your lungs （肺），clean your blood and do many other things．Ginseng also provides energy for people． In fact， many modern energy drinks that you see in stores have ginseng．
In some parts of U．S.. there is a plant called lady fern （蹄盖蕨）．This is the plant you need if you've been stung by a bee， or if you've got a small burn or a cut． Lady ferns are great for making your skin feel better． All you have to do is roll one of its leaves and make it into pieces in your hands． The juice inside the leaf will help your skin feel better．
If you're hiking in Europe， look for a flower called tansy（艾菊）．
This yellow flower is a natural insects' enemy．You just rub it on your skin，and insects will leave you alone．
Sage （鼠尾草） is one of the most useful plants in the world． Because it has so many uses，it's also quite valuable． Human beings have been using sage for a very long time． In Europe， before fridges appeared， people used sage to keep food． Over the years， people have used sage to fight all kinds of health problems． Sage has been used to treat colds， stop muscle （肌肉） problems and reduce （减少） swelling． In fact， sage comes from the Latin word " salvere "， which means"to be saved"．
（1）How many kinds of useful plants are mentioned in the passage？
A．2
B．3
C．4
D．5
（2）Which of the following about ginseng is NOT TRUE ？
A． It's still being used in Chinese medicine．
B． It can make people fell sleepy．
C． It can be found in many modern energy drinks．
D． It is helpful to our lungs and blood．
（3）Lady ferns can make your feel better．
A． skin
B． muscle
C． burn
D． cut
（4）What does the passage say about sage？
A． It's the most useful plant in the world．
B． It hasn't been used by people for long．
C． It was once used to keep food in Europe．
D． Its name comes from a German word．
（5）What can be the best title for this passage？
A． How to Protect Plants
B． Some Harmful Plants
C． How to Grow Plants
D． Some Useful Plants
The giant panda is an animal popular with people all over the world．
With their black and white fur and soft round bodies， they are loved by the old and young． Do you love them？ If you do， why not join in a panda volunteer program？ Here are some tips for you if you want to be a volunteer of the programs．
Book （预定） Early
If you don't book early， the programs may become fully booked． Some volunteer programs limit （限制） the number of the volunteers． We suggest booking at least one week in advance （提前）．
Follow the Instructions
Giant pandas lead a very different life． Sometimes， it is very hard for them to stand outside influences． We'd better not disturb （打扰） their peaceful life， so some of the activities might be changed or canceled．
●Please do not make any noise or movements that might disturb the pandas．
●Please do not get close to the pandas or throw food to them， unless the panda keeper tells you to do so． It might disturb the pandas' eating habits and cause them to become sick．
●For your safety， do not get into the cage， touch the adult pandas， or let them touch you，unless the panda keeper tells you to do so．
●Do not take photos or videos unless it's allowed．
Dress Code
To protect yourself when carrying bamboo，please do not wear shorts or slippery（滑的）shoes．Also，pandas have a very keen （敏锐的） sense of smell． As you will get very close to them，please do not wear perfume （香水） or nail polish．
（1）If you don't book the program early， it may ．
A． be changed
B． be canceled
C． be put off
D． become fully booked
（2）The writer suggests booking at least in advance．
A． one week
B． two weeks
C． three weeks
D． four weeks
（3）Which of the following is NOT TRUE， according to the passage？
A． Do not make any noise that might disturb the pandas．
B． You can throw food to the pandas freely if you like．
C． Do not get into the cage without being told to do so．
D． Do not take photos or videos unless it's allowed．
（4）Why are you advised not to wear shorts or slippery shoes when carrying bamboo？
A． To protect pandas．
B． To protect bamboo．
C． To protect yourself．
D． To protect others．
（5）Who may be interested in this passage ？
A． A peace lover．
B． A panda lover．
C． A music lover．
D． A panda keeper．
Bi Sheng was born in Song Dynasty． He lived in a small village which lies in Huanggang today．He invented the printing around 600 AD（公元）．He was the worlds first inventor of the printing． It is about 400 years earlier than the printing in Germany．
The printing is also called the movable type printing （活字印刷）．But how did it work in the past？
First of all， the clay was made into movable types． Then words were engraved （雕刻） carefully onto the types． After that the words were chosen and put in right order in a box according to the text． Next， the workers brushed ink onto the movable types． Finally the types could be used for printing． They could be used again and again for different books．
The movable type printing plays an important role in Chinese culture．With the help of it， Chinese culture spread around the world more quickly． At the same time，the movable type printing was widely used in the world at that time． As a result， more and more culture communication among countries took place．
The movable type printing， the compass （指南针），gun powder and the paper﹣making are called four great inventions of China． They make China own an important and even top position in the history of human civilization （文明）．
（1）When was the movable type printing invented？
A． About 600 years ago．
B． Around 600 AD．
C． Before Song Dynasty．
D． About 400 years ago．
（2）What should the workers do after the words were chosen and put in right order？
A． Brush ink onto the types．
B． Make the clay into movable types．
C． Print by using the types．
D． Engrave words onto the types．
（3）How many steps were there in the movable type printing？
A． Three．
B． Four．
C． Five．
D． Six．
（4）What does the word "it" in Paragraph 4 refer to？
A． the compass
B． gun﹣powder
C． the paper making
D． the movable type printing
（5）What's the passage mainly about？
A． Four great inventions and their position in the history of human civilization．
B． Bi Sheng invented the movable type printing after trying many times．
C． The movable type printing and the importance for the culture communication．
D． How Bi Sheng invented the movable type printing in Song Dynasty．
Three﹣two ﹣one， fire!
At the moment of 9：43 am， on Tuesday， June 23rd， 2020， at the Xichang Satellite Launch Center （卫星发射中心） in Sichuan Province， the last satellite of the third﹣generation nehoork （第三代导航系统）was sent into space． It is the 55th member in the family of BeiDou． It belongs to China's Beidou Narigation Satellite System （BDS北斗卫星导航系统）． So far． 59 satellites， including the first four test ones， have been launched from Xichang With the development of China， we have already owned three other famous satellite launch centers﹣﹣Jiuquan， Taiyuan and Wenchang．
After a period of tests in space， this new satellite has started to work with other Beidou satellites together． It is designed to work for at least 12 years． So far，China has completed the third﹣generation network of China's BDS． It was a new milestone in the nation's space research work． The launch showed our country has completed our largest space ﹣based system． I's one of four global（全球的） navigation networks，including the United States' GPS， Russia's GLONASS and theEuropean Union's Galileo．
BDS has been widely used as public resources（ 资源） in our daily life． It has been shared by the whole world． It will provide more services around the world． BDS is the common wealth of the development of human beings．
（1）Where did China launch the last satellite of the third﹣generation network？
A． Xichang．
B． Jiuquan．
C． Wenchang．
D． Taiyuan．
（2）How many members are there in the family of Beidou？
A．4．
B．55．
C．59．
D．114．
（3）What does the underlined word "milestone" mean in Chinese？
A．记录
B．事业
C．里程碑
D．起点
（4）GLONASS belongs to ．
A． China
B． the United States
C． Russia
D． the European Union
（5）According to the passage， we can know that ．
A． The last satellite of BDS was launched at 9：43 pm， June 23rd， 2020
B． The new satellite is designed to work for at most 12 years
C． BDS is shared only by China as public resources
D． So far， China has completed the third﹣generation network of China's BDS