Cause and effect is one way to explain things that happen around us．Many things happen because something caused or influenced them to happen．Sometimes it is hard to look at a cause and find out what caused or influenced them to happen．Sometimes it is hard to look at a cause and find out what causes the effect．It may help you to start with the effect and use your reasoning(推理的)skills．Think about all the things you know that could be reasons for the effect you can see．
For example, you may see someone putting on a heavy jacket．This is the effect．To look for a cause, think to yourself, “What would take someone put on a heavy jacket?” Maybe the person is going outside into very cold weather．Maybe the person works in the penguin pen(企鹅圈养地)at Sea World．Maybe the person is going to visit an ice skating rink where the air is kept very cold．All of these things could be a cause for putting on a heavy jacket．
Now, think about a second example．The effect is a boy named Abi has to go to the head teacher's office．What are the possible causes? Maybe he bullied(欺负)another student．Maybe he is just being picked up early．Maybe he is being given a prize!
Here is another example for you to think about its cause and effect．Cait, 13, was trying to fall asleep when her 8-year-old brother, Doug, came into her room．He looked around a bit, but seemed really out of it．Then Doug went back into the hallway and stood there looking straight up at the hall light for quite a while．Little brothers can be very strange, but this was really much too strange．Cait's father appeared and explained that Doug was sleepwalking．What's the cause end effect, could you tell?
根据材料内容选择最佳答案。
(1)
According to the second paragraph, which of the following is an effect?
[ ]
A．
Someone puts on a heavy jacket．
B．
Someone works in the penguin pen．
C．
Someone will go outside into cold weather．
D．
Someone will go to visit an ice skating rink．
(2)
Abi has to go to the head teacher's office．Which of the following isn't the possible cause?
[ ]
A．
He bullied another student．
B．
He is going shopping．
C．
His is being picking up early．
D．
He is being given a prize．
(3)
What was Doug doing when his sister Cait tried to fall asleep?
Many young people can use the computer, but few of them know how to look after them．Remember the following when you use the computer．
●Keep your computer in a cool, dry room．Too hot or too cold is bad for computers．Damp is also bad for them．Most computers work best at a temperature of 5－30 degrees centigrade(摄氏度)．
●Do not let people smoke cigarettes near your computer．Smoke of all kinds is very bad for many parts of a computer and can cause many problems．
●Do not eat or drink when you are near your computer．Pieces of food and a little water in the keyboard can also cause many problems．
●Make sure that the keyboard and the screen are the correct height(高度)for you．If they are not correct, you‘ll get backache．
●Make sure the screen is the correct distance from your eyes．If you wear glasses, make sure these glasses are correct for using with the computer．Some people use a different pair of glasses when they use a computer．It can protect(保护)their eyes．
●Keep your screen clean and do not have it too bright．A dirty screen can hurt your eyes．A very bright screen can also be bad for your eyes．If you can afford one, buy a computer screen．It will be better for you than using the screen of a TV set．
(1)
From this passage, we know ________．
[ ]
A．
most young people can use computers well but few of them know how to keep them well．
B．
fewer and fewer people pay any attention to the protection of the computers．
C．
more and more people can use computers, and they can take good care of them, too．
D．
Most computer lovers are fond of eating their food while playing computer games．
(2)
Which season does the computer like best?
[ ]
A．
Spring．
B．
Summer．
C．
Autumn．
D．
Winter．
(3)
When you use the computer, you had better not ________．
[ ]
A．
smoke
B．
eat food or drink
C．
talk to someone
D．
A and B
(4)
Some people use a different pair of glasses when they use a computer because they
want to ________．
[ ]
A．
protect the computer
B．
stop their eyes being hurt
C．
make them look cool
D．
show off his glasses
(5)
Which is NOT true according to(依照，根据)the passage?
[ ]
A．
If the height of the screen isn’t correct, you’ll get backache．
B．
Smoking is bad for a computer．
C．
You should wear a pair of glasses when you use a computer．
D．
You should use a computer screen instead of a TV screen．
Here is a page from a magazine named Future．Read the following information about things that may happen in ten years．And then do the exercises below．
Get Ready For the Future
Cars will run on solar power(太阳能)or electricity and will be much cleaner．They will be much safer．For example, if you are too close to another car or if you are driving dangerously, your car will slow down by itself．
Because there won't be any spare land, new cities will have to be built in the sea．Some cities on water will have two levels(层)．People will live on the upper level, the lower level will be used for traffic, shops and factories．
Biotechnology(生物技术)will make food better and healthier．Plants that are not affected(影响)by insects or illnesses will be developed．The taste of fruit and vegetables will be better and food will be kept longer．
New technology will be used to make TVs that are only 5 cm thick．They will have pictures that are as clear as photos．Electrical appliances(家用电器)will be quieter and will be controlled by computer, they will also use 50％ less power．
Many new ways to cure(治愈)illnesses will be successfully using products of genetic engineering(基因产品)．Cures will be found for the flu and the common cold．However, some new illnesses will appear．
(1)
Cars using solar power or electricity will ________．
[ ]
A．
cause more pollution
B．
save(节省)energy but cause more accidents
C．
cause fewer accidents and less pollution
D．
cause more accidents but save energy
(2)
People will be able to ________．
[ ]
A．
live in the cities above the sea
B．
live in the cities in the sea
C．
live in the cities on the moon
D．
live in the spare land of the country
(3)
Biotechnology will help ________．
[ ]
A．
divide food into two groups
B．
cure the illness of plants
C．
make fruit and vegetables taste better
D．
kill the insects
(4)
Electrical appliances will save 50％ of power because ________．
[ ]
A．
they are controlled by computer
B．
they are only 5 cm thick
C．
they are quieter
D．
the passage didn't tell us
(5)
Which of the following is true according to the passage?
[ ]
A．
The information above is about modern science．
B．
Genetic engineering can cure all the illnesses．
C．
Biotechnology can cure flu and common cold．
D．
Computers will use 50％ more power．
阅读理解。
Even a child knows that nodding(点头)the head means“Yes”．But some people will probably be puzzled(迷惑的)when they first come to India．When they talk to an Indian, he often shakes his head．They might think that the Indian does not like what he said, but on the contrary, he is expressing agreement．
The Indians have a habit of shaking their heads slightly when they talk to somebody．It doesn't mean“No”, but“Yes”．If a person doesn't know this, it might cause misunderstanding(误解)．
At one time a foreigner in India told his driver who was an Indian to take him to his office．The driver shook his head．The foreigner said his request again and the driver still shook his head．At last, the foreigner shouted angrily,“Drive me to my office at once!”The driver said in a low voice,“Yes, sir,”smiling and shaking his head again at the same time．
(1)
In general, nodding the head means ________ and shaking the head means ________．
[ ]
A．
“Yes”…“No”
B．
“No”…“Yes”
C．
“Yes”…“Yes”
D．
“No”
(2)
According to the habit of India, if someone agrees with you, he will ________．
[ ]
A．
nod his head
B．
shake his head
C．
neither nod his head nor shake his head
D．
both nod his head and shake his head
(3)
Why did the Indian driver shake his head when the foreigner asked him to drive him to his office?Because ________．
[ ]
A．
the Indian driver had something important to do
B．
the foreigner agreed to give him only a little money
手拉手全优练考卷系列答案
Cars will run on solar power(太阳能)or electricity and will be much cleaner．They will be much safer．For example, if you are too close to another car or if you are driving dangerously, your car will slow down by itself．