About ten men in every hundred suffer from color blindness in some wayWomen are luckierOnly about one in two hundred is affected in this matterSo some people say it is safer to be driven by women

There are different forms of color blindness]n some cases a man may not be able to see deep redHe may think that redorange and yellow arc all shades(色调)of greenSometimes a person cannot tell the difference between blue and greenIn rare cases an unlucky man may see everything in shades of green--a strange world indeed

Color blindness in humans is a strange thing to explainIn our eyes there are millions of very small things called “cones”These help us to see in a bright light and to tell differences between colorsThere are also millions of “rods”but these are used for seeing when it is nearly darkThey show us shapes but no color

Some insects have favorite colorsMosquitoes蚊子like blue but do not like yellowA red light will not attract insectsbut a blue lamp willIn a similar way humans also have favorite colorsYet we are luckyWith the aid of the cones in our eyes We can see many beautiful colors by dayand with the aid of the rods we can see shapes at nightOne day we may even learn more about the invisible看不见的colors around us

1With the help of the coneswe can _________

Asee in a weak light                                   Btell different shapes

Ckill mosquitoes                                           Dtell orange from yellow

2Why do some people say it is safer to be driven by women?

AWomen are more careful

BThere are fewer color blind women

CAll of them see everything in shades of green

DNone of them has trouble in recognizing识别colors

3This passage is mainly about _________

Acolor and its surprising effects                         Bdanger caused by color blindness

Ccolor blindness                                          Dthe invisible colors around us

Do you think there is too much noise in our city? If you live near an airportyou will be unhappy because of a plane often make a loud noiseThe sound of planes or heavy vehicles is likely to cause deafness if heard continuously(不断地).

However, most people in our city do not seem to mind noise. They like to enjoy music when they are doing uninteresting jobsIt is a new danger because pop musicwhen played through powerful amplifiers(放大器),can reach 120 decibels120分贝的)at a distance of five feetA continuous noise of over 85 decibels can cause deafnessIt was discovered that many young people in America could hear no better than 65-year-old people

In the past we used to think that only workers in every noisy places would become deafFor examplewhen newspapers and books are being printedthe noise level is over 85 decibelsand some of the workers become deafTodayhoweverscientists believe that 10 percent of the workers in Britain are being deafened by the noise

Sometimes noise of less than 85 decibels can make some people tired and stressedWe all know that too much noise makes life difficult and unpleasantIt can do great harm to people's health and prevent people from working wellWorkers in noisy offices are not as efficient(效率高的)as those in quiet officesNoise makes people less efficientCan anything be done to reduce or control noise?

In Britain the government has made several laws to reduce noiseThough the government has spent a lot of money in making airports and main roads quietermany people think that there are still not enough lawsFor examplethere are no laws to control the noise of machinesIn JapanAmerica and Norway there are such lawsAs a resultworkers can be given compensation赔偿if they become deaf

1Some workers become deaf because of ________

Ahard work                               Ba continuous noise of over 85 decibels

Cpowerful amplifiers                       Duninteresting jobs

2Noise below the level of 85 decibels ________

Acan affect some people's moods                     Bcannot do any harm

Ccan cause sudden deafness                 Dcan make office workers efficient

3In Britain there are laws to ________

Astop workers from becoming deaf                   Bcontrol the noise of machines

Ckeep down noise                        Dhelp deaf workers in need

4Who can be given compensation if they become deaf?

AAmerican workers

BBritish workers

CBoth American workers and British workers

DNone of the above answers

Mary picked up a pencil and a piece of papersaying“Nowyou want to earn money for the autumn camping tripright?” Tomher brothernoddedHe wasn’t able to go last year because he hadn’t earned enough money during the summerThis year he came up with a plan

He made a necklace for his mother that everyone admiredThey were surprised to learn that Tom had made it for herWhy not make more necklaces and sell them?

“OK” said Mary“The first thing you need to do is to figure out计算how much you have now’’

“I have $20.00 in the bankand $7.25 in my room” explained Tom

“That gives you a total of $27.25” said Mary“That is called your capitalThe next thing you need to know is how much it will cost you to make each necklace

“Wellthe pet shop wilt give me all the feathers the birds loseI'll have to buy the beads小珠子and string” said Tom

Mary wrote on the piece of paper

CAPITAL       $27.25

EXPENSES      Feathers      no coat

String for lo necklaces     $2.50

Beads for lo necklaces    + $15.00

Total                    $17.50

“How much do you think you can sell such a necklace for?” asked Mary

“Hmm” Tom looked thoughtful and said“There's a shop in town that sells almost the same kind of necklace for $ 7.50If I charge(要价)$ 6.00people will think that's a bargain

“OKIf you sell each necklace for $ 6.00you'll make a good profit(利润)on each then” said Mary

“Hurray!” Tom cried“If I sell 2.0 necklacesI'll have enough from the profit for the camping trip and $10.00 left over

1Which word best describes Mary?

AConfident        BGenerous        CHelpful           DOutgoing

2The underlined word "bargain" in this story means “________”

Asomething sold cheap                                  Bsomething sold expensive

Csomething made at home                             Dsomething made by children

3How much would Tom have to spend on the camping trip?

A$ 47.45            B$ 75               C$ 85                     D$102.25

4How did Tom know how much he would have left over after paying for the camping trip?

AHe took the cost of the trip from the profit he would make on 20 necklaces

BHe added the cost of the trip to the profit he would make on 20 necklaces

CHe asked Mary for the answer

DHe took the cost of each necklace from the amount of money he had to begin with

5What's the best title for this story?

AHow to Make Necklaces                              BHow to Sell Necklaces

CHow to Make a Plan                                    DHow to Earn Money for a Trip

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