9B Unit 2 易错题练习
一、单词拼写
1．Armstrong and Aldrin collected Moon rocks to take back to the Earth for ________(进一步的) research.
2. Because of the snow, the ________ (飞行员) had to land the plane at an airport in another city.
3．Most girls like to look at themselves in the___________ (镜子)．
4．My mother was very angry when she saw her room in a___________(杂乱)．
5．The computer has caught_________(病毒)and it doesn’t work now·
6 .Ten _______ (salesman)are needed in the supermarket.
7 .The robot can go _______ (shop) at the supermarket.
二、单项选择
1．We can solve the problem________many ways．
A．on B．in C．at D．with
2. I have three pen friends. One is , and the other two are .
A. Japanese; America B. Russian; Germany
C. Canada; Australia D. English; Frenchmen
3. The number of people who English as a foreign language more than 750 million.
A. learns; are B. learn; is C. learns; is D. learn; are
4 Could you tell me ____ the strange bird looks like
A. which B. how C. what D. why
5. --- Could you tell us ______ to travel from Earth to Mars by spacecraft --- It takes months, I think.
A. how far it takes B. how long it takes
C. how long does it take D. how soon does it take
6．一Where Can I keep these books 一Here is a box full of bananas．You can__________it and put the books in．
A．throw B．empty C．sell D．bring
三、完形填空
There are robots all around us，making our lives easier．Some of them，like the 1 calculator(计算器)，can work much more quickly than human beings 2 ．And they never make mistakes．In some ways robots are better than people．They work quickly， 3 do not make mistakes．They do not get 4 doing the same job over and over again．And they never get tired．
So robots are very useful in factories．They can be taught to do many different jobs．First their electronic brains must be shown 5 the job is done．A person moves the robot’s arms and hands through each part of the job．The robot’s brain 6 each move．W hen the robot is put to work on its own，its brain controls the rods(杆)，wheels，and motors which 7 its arms．
When the robot is 8 for a new job，its electronic memory is“wiped clean”．Then it is taught how to do its new task．
If the robot’s hands stop working，or if something gets in the way，it cannot do the next part of the job．So it stops and signals(发出信号)for 9 ．Then a human engineer attends to(处理)the fault．
Robots are also used for doing jobs that are 10 ．They can move objects which are too hot or too heavy for people to deal with．
( )1．A．bag B．pocket C．big D．machine
( )2．A．do B．did C．may D．can
( )3．A．but B．still C．further D．then
( )4．A．exciting B．boring C．bored D．surprised
( )5．A．how B．why C．what D．that
( )6．A．reminds B．keeps C．watches D．remembers
( )7．A．move B．support C．1ift D．lower
( )8．A．taken B．supported C．needed D．done
( )9．A．danger B．anger C．hunger D．help
( )10．A．good B．dangerous C．clean D．safe
四、阅读理解
Whenever you walk past a cafe, you might be drawn in by the smell of freshly made coffee. But the minute you try this dark drink you will regret it, because it tastes like bitter Chinese medicine.
Why does something that smells so good tastes so bad Many people are curious about this, but now scientists say they have found the answer—it lies in our “second sense(感觉) of smell”， according to The Telegraph.
“We have two senses of smell，” explained Barry Smith, a professor of the University of London. “One is when you breathe in things from the environment, and the other is when the air comes up to the nose and is breathed out through the nose.”
When we drink coffee, for example, the act of swallowing(吞咽) sends a burst of smell up the back of our nose from inside the mouth. This wakes up the second sense of smell in our brain. But it is weaker and less sensitive to flavours(味道). As a result, it gives us a completely different feeling.
In fact, the second sense of smell plays a big part in our eating experience. It may be common sense that we smell through our nose and taste using our tongue(舌头). But the truth is 80 percent of what we think of as taste actually reaches us through smell. Just hold your nose while eating and you will notice that your tongue can only catch a very small part of the flavour.
( )1. Why does something that smells so good tastes so bad
A. Because we have two senses of smell.
B. Because our “second sense of smell” works.
C. Because different people have different tastes.
D. Because people have both tongues and noses.
( )2. Which body part does not play a role in sensing the flavour
A. The nose. B. The tongue.
C. The eyes. D. The mouth.
( )3. Which of the following is NOT true
A. We have two senses of smell.
B. The first sense of smell is weaker and less sensitive to flavours.
C. The tongue can only catch a small part of the flavour.
D. We usually think we smell through our nose and taste using our tongue.
( )4. The underlined word “sensitive” in the fourth paragraph means “________”.
A. 敏感的 B. 迟钝的
C. 强烈的 D. 虚弱的
( )5. The best title for this passage is “________”.
A. Smell good or taste bad
B. The second sense of smell
C. Coffee tastes like bitter Chinesemedicine
D. Our tongue and nose
五、任务型阅读（根据短文内容，完成下面的表格。每格填一词。）
WARNING: Holding a cell phone against your ear or putting it in
your pocket may be bad for your health.
This sentence is a warning that you’d better not put it close to you when a new phone is bought. Apple company, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research in Motion, BlackBerry’s producer, recommends 2.5 centimeters.
If cell phone use can cause health problems, the result will be very serious. Americans spend 2.26 trillion (万亿) minutes chatting on cell phones every year, which brings $109 billion for the wireless businessmen.
Devra Davis, professor who has worked for the University of Pittsburgh, has published a book about mobile phone radiation (辐射). Davis studies how often brain cancer happens during different age groups. She finds a big increase in brain cancer in the 20-to-29 age group and a drop for the older people.
Children are more easily hurt by radiation than grown-ups, Ms. Davis and other scientists point out. But no studies have yet been finished on cell phone radiation and children, she says.
Henry Lai, a research professor, began lab radiation studies in 1980 and found that mice exposed to (暴露在) radiofrequency（电波频率）radiation had destroyed DNA in their brains.
Ms. Davis recommends using wired earphones（有线耳机）or the phone’s speaker. Children should send text messages rather than call, she said, and pregnant (怀孕) women should keep phones away from their bodies.
It’s (1) to your health to use cell phones
Warning from differentcompanies ● Apple company, the (2) distance is 1.5 centimeters.
● Motion, BlackBerry’s producer recommends 2.5 centimeters
The results of research from different areas ● Devra Davis pointed out that people in the 20-to-29 age are more likely to have brain cancer than older people (3) of mobile radiation. ● Ms. Davis and other scientists studied that children are (4) to be hurt by radiation than adults.
● Henry Lai found that mice exposed to radiofrequency radiation had destroyed DNA in their brains.
Ms Davis’s (5) on how to use the cell phone safely ● It’s better for children to send text messages than to make a phone call. Pregnant women should keep phones away from their bodies.

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