Taking away a city’s rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can’t eat or use. If we kept these things, we would soon have a mountain of rubbish.
In some cities the rubbish is collected and taken outside of city to a dump. Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used wate r from toilets, bathtubs and other places.
To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally , a house or a school may be built there, and then you’d never know that this had once been an old rubbish dump.
In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly change into something called humus, which looks like black earth. It is rich with kinds of things that feed plants and help make them grow.The underline word “sewage” in the passage means_______
| A．排污 | B．染色 | C．洗涤 | D．洗尘 |
According to the passage, the food parts of rubbish can be used again_______.
| A．to feed animals | B．to feed plants |
| C．to build a house | D．to make machines |
The main idea of the passage is ______
| A．to let us know taking away rubbish is a big job. |
| B．to explain the need for rubbish collection |
| C．to introduce different ways to treat rubbish |
| D．to tell people to take useful things out of rubbish |
此篇为判断正（A）误（B）题
Sometimes people cry when they are sad． Other times people cry tears of joy． But your eyes make tears all the time， whether you are crying or not． Do you know the tears help keep your eyes healthy？ They keep your eyes from drying out． A special area of the eye drips （滴） all the time． It keeps the eye humid．
If you look in a mirror， you can see tiny holes in the corners of your eyes． Each hole leads to a small tube that runs to your nose． Tears run slowly into this tube drip by drip． Day and night the holes drain （流走） the tears away． If they didn't， you would always look as if you were crying．
If you begin to cry， there are many more tears． The holes can't drain all of them． Then extra tears run out onto your face．
Tears help keep eyes safe． If there is something harmful in the air， the eyes fill with tears． These tears coat your eyes． They keep the harmful air out．
Contact lenses （隐形眼镜） can make the eyes too dry． Some people have to add tears to their eyes．
They buy bottles of eye drops to keep their eyes wet．
（1）Eyes make tears no matter how people feel．
（2）When you cry， tears run into your nose or onto your face．
（3）If there is something harmful in the air， tears protect your eyes by covering them．
（4）Contact lenses make you have more tears in your eyes．
（5）Tears are harmful to your eyes．
Have you ever counted the number of digits （数字）in your mobile phone number？ Your number has 11 digits． You may sometimes find it hard to remember your number． That's because China has the longest mobile phone numbers in the world． Why is that？
The 11 digits can be divided into three parts． Each part has a different meaning． The first three numbers tell you which mobile phone service provider（提供者） you are using． For example， 135 is for China Mobile Communications Corporation and 188 is for China Unicom． The fourth to the seventh digits tell you where the number is registered （注册）． And the last four digits are random（随机的）．
The main reason for using 11 digits is that we have the largest population in the world． We once had 10numbers． But as our population grew， there were not enough numbers for us to use． So we began to use 11 digits starting from 1999． Eleven digits can be used to make tens of billions of mobile phone numbers． That's enough for each person to have seven or eight phone numbers to use in China．
And mobile phone numbers can be recycled． Usually， the service provider will reuse a canceled number after three to six months． If you call a number that you haven't contacted （联系）for a long time， you may find that its owner has changed．
Besides China， Britain and Japan also use 11﹣digit mobile phone numbers． But their numbers always start with 0． So they cannot create as many numbers as we can． Countries like the United States， Australia and India use phone numbers with 10digits． Canada's mobile phone numbers are perhaps the shortest in the world： they use seven digits．
（1）Is China the only country that uses 11﹣digit mobile phone numbers in the world？
（2）What can we know from the fourth to the seventh digits of a mobile phone number in China？
（3）Why does China use 1l digits for mobile phone numbers？
（4）When can a mobile phone number be recycled in China？
（5）Which country perhaps has the shortest mobile phone numbers in the world？
What was discovered by accident？ The answer is penicillin（青霉素）． It kills germs． By killing germs， it saves lives． Suppose you are sick． You go to a doctor． She examines you． She says you have a" staph'" infection（葡萄球菌感染）． She gives you some medicine． You take it． The medicine knocks out the staph． Soon you are well． Before penicillin， this would not happen． Staph was almost sure death．
Everyone wanted a medicine． Laboratories worked day and night． They grew the staph in small dishes． Then they tried to kill it． Nothing worked．
The laboratory dishes had covers on them． They kept things from falling into dishes． Molds（霉菌）were a big worry． They are always in the air． You can't see them． They're too small． There are thousands of different molds． Molds can make an experiment （实验）fail． That's why dishes are covered．
Dr． Alexander Fleming was working to kill the staph germ． He worked for years． One day he took a cover off a dish． He looked inside． There was a thick growth of staph germ． There was also some mol
d． Then he saw something strange． Where the mold was， there was no growth of staph． This is what Fleming probably thought． "By accident， I found a mold to kill the dreaded staph．"
This is how penicillin was found． But here's the real miracle（奇迹）． There are thousands of kinds of molds． But only one kind can kill staph． The mold must have fallen into the dish a few days before． The cover was probably off only a few seconds（秒）． In those few seconds the right mold fell into the right dish． Another man might have thrown the dish away． But Fleming was very careful and smart． He understood what the mold did． How lucky the humans were !
根据短文内容，选择最佳答案．
（1）During the experiments to find a medicine for staph infections， ．
A． the dishes were not covered
B． staph and mold were put together
C． mold was kept in small dishes
D． staph was grown in small dishes
（2）The word" dreaded" means " "．
A． famous
B． scary
C． healthy
D． endangered
（3）The last paragraph suggests that ．
A． accidents happen to everyone
B． the careful person does not have accidents
C． the careless person will miss valuable chances
D． luck is enough when doing scientific experiments
（4）Most of this passage is written by ．
A． telling an unusual story
B． showing the results of experiments
C． offering some reasons
D． giving some advice
（5）This passage is mainly about ．
A． medicine for a staph infection
B． useful accidents
C． Dr． Fleming's research
D． discovering penicillin
People already know a lot about animals． However， there are still some things about animals that may surprise you． Here are some facts about animals you probably didn't know．
Cows do have best friends and feel stressed when they are separated． Scientists have found that cows are very social animals and a cow always makes friends with other cows． When a cow is with its friends， it feels relaxed， compared with when it is alone．
During breeding season， a male penguin（企鹅）will offer a small stone to a female penguin as a gift． If she takes it， they will become partners． When the female penguin lays an egg， she and her partner may carry it on their feet， because some penguins don't build nests（鸟巢）．
Crocodiles（鳄鱼） swallow（吞）stones． Crocodiles always swallow their food instead of eating it like other animals． They swallow stones which break the food into very small pieces in their stomachs． These stones may stay in their stomachs all their lives．
Elephants use plants to treat pain or other illness． Scientists once found a pregnant（怀孕的） elephant in Africa who ate a kind of plant which was not part of her normal food． Four days later， she gave birth to a baby elephant． The same plant was used by the local pregnant women．
根据短文内容，判断下列句子正误．正确的用"A"表示，不正确的用"B"表示．
（1）A cow hates making friends with other cows．
（2）All the male penguins will build nests if the female penguins lay eggs．
（3）Crocodiles swallow stones to help with digestion （消化）．
（4）Elephants eat plants only when they are hungry．
（5）The passage mainly tells us some surprising facts about animals．
Who's working while you're asleep？
Police officers
Some police officers answer calls every night at the station． Others go around the town and city on foot or in cars．因为他们辛勤工作，你才能安然入睡．
Firefighters （消防队员）
Even at night， firefighters are ready to help． Whenever they get a call，they will go at once to fight fires and help people．
Doctors
If you get sick or hurt at night， doctors can take care of you at the hospital． The doctor will examine（检查）you， give you medicine and even do an operation（手术）on you．
Bakers（糕饼师傅）
You may never think that bakers often start the day while you are still asleep． They prepare all the things they need for the day and then start working． Bakers want their bread and cakes to be fresh and delicious every day．
In fact， many other people work at night． Let's thank them for everything they do for us．
（1）将文中划线的汉语句子译成英语．
（2）将文中划线的英语句子译成汉语．
（3）回答问题：
How many kinds of things can the doctor do at night？
（4）回答问题：
What do bakers prepare before they start working？
（5）从文中找出与下面所给句子意思相同的句子．
It's true that a lot of people as well as these people work at night．
粤公网安备 44130202000953号