Our sense of smell, which we normally take for granted, is nowadays being increasingly used for purposes which might surprise us if we realized them.

  One area in which smells are created to achieve particular results is marketing. For some time producers have taken advantage of our sense of smell with regard to household goods.

  When pleasant smells are passed through a store’s air conditioning system, people tend to spend more time in the store and buy more. For example, the smell of chocolate is used in sweet stores, while the smell of leather and perfume are used in clothes stores.

  In a test, people looked at the same types of shoes in two rooms—one filled with purified air, the other with a smell of mixed flowers. Eighty-four percent of the people preferred the shoes in the room with the smell of flowers. In fact, many said they would have paid up to US $ 10 more for a pair.

  Smells also have other uses. Research has shown that certain smells can help to calm anxious people and increase their feeling of safety. Smells such as that of flowers and pine forests might therefore be used to relax patients in doctors’ and dentists’ waiting rooms, and to make the environment more pleasant and less stressful to them.

  Some companies are experimenting with different smells to produce different efferent effects on their workers according to the time of day.

  For example, early in the morning they might put the smell of lemon in the air conditioning system to wake people up. In the middle of the morning, when the atmosphere tends to become more tense, the smell of wood could be used to calm people down. Before lunchtime the smell of melting butter would encourage people to go to lunch on time. After lunch, when people often begin to lose attention, the smell of mint would increase their watchfulness.

  While some of these uses of smells may e helpful and effective, not everyone would agree with their use to control customers in stores. It has been suggested by consumers’ organizations that one way to avoid this new subconscious（无意识）pressure to buy is to go shopping when people are less likely to be influenced by smells.

We can conclude from the text that      

smells are widely used in different shops  B. different smells can keep people feel happy

C. smells are effective if used in suitable cases D. hospitals take advantages of the sense of smell

What kind of smell is effective when the students are having a lesson according to the text?   Butter.        B. Leather        C. Wood        D. Mint

The 4th paragraph proves that       

pleasant smells attract people’s attention to stores

B. people prefer the shoes with the smell of different flowers

C. right smells increase people’s view of the value of a product

D. people want to pay more money because of good smells

What does the underlined word “them” in paragraph 5 refer to?

A. patients      B. doctors       C. smells       D. waiting rooms

 Our sense of hearing is one of the most important means of knowing what is going on around us. We are warned of danger by sounds. The sounds of music please us. Sound has a waste product, too, in the form of noise. Noise has been called unwanted sound. Noise is growing and it may get much worse before it gets any better.
Scientists, for several years, have been studying how noise affects people and animals and are alarmed by what they have learned.
Peace and quiet are becoming harder to find. Noise pollution is no joke. It is a threat that should be looked at carefully.
Sound is measured in units called decibels （分贝）. At a level of 140 decibels people feel pain in their ears.
Trucks, buses, motorcycles, airplanes, boats, and factories all make noise. This noise bothers not only our ears, but our minds and bodies as well.
There is a saying about "it is so noisy that you can't hear yourself think". Doctors who study noise believe that we must be able to hear ourselves think most of the time. If we don't, we may have headaches, other aches and pains, or even mental problems. Noise adds even more tension to a society which already faces too much stress.
49．The sense of hearing _______.
A．makes people feel angry   
B．makes people want to dance
C．helps people to know what is happening around them
D．is something harmful to people
50．When sound is turned into noise, _______.
A．people become ill                  B．it makes people forget the past
C．people don't know how to deal with it  D．it becomes a kind of pollution
51．Why does the passage say " Peace and quiet are becoming harder to find " ?
A．Sounds of over 140 decibels are common these days.
B．There are always wars going on in the world.
C．The world is making more and more noise.
D．All kinds of machines make noises.
52．Which of the following statements is TRUE?
A．Scientists are warning people noise can be harmful.
B．It's possible for man to get rid of all noises.
C．Sounds under 140 decibels are not considered to be noise.
D．Society has become more lively because there is noise now. 

 Our sense of hearing is one of the most important means of knowing what is going on around us. We are warned of danger by sounds. The sounds of music please us. Sound has a waste product, too, in the form of noise. Noise has been called unwanted sound. Noise is growing and it may get much worse before it gets any better.

Scientists, for several years, have been studying how noise affects people and animals and are alarmed by what they have learned.

Peace and quiet are becoming harder to find. Noise pollution is no joke. It is a threat that should be looked at carefully.

Sound is measured in units called decibels （分贝）. At a level of 140 decibels people feel pain in their ears.

Trucks, buses, motorcycles, airplanes, boats, and factories all make noise. This noise bothers not only our ears, but our minds and bodies as well.

There is a saying about "it is so noisy that you can't hear yourself think". Doctors who study noise believe that we must be able to hear ourselves think most of the time. If we don't, we may have headaches, other aches and pains, or even mental problems. Noise adds even more tension to a society which already faces too much stress.

49．The sense of hearing _______.

A．makes people feel angry   

B．makes people want to dance

C．helps people to know what is happening around them

D．is something harmful to people

50．When sound is turned into noise, _______.

A．people become ill                  B．it makes people forget the past

C．people don't know how to deal with it  D．it becomes a kind of pollution

51．Why does the passage say " Peace and quiet are becoming harder to find " ?

A．Sounds of over 140 decibels are common these days.

B．There are always wars going on in the world.

C．The world is making more and more noise.

D．All kinds of machines make noises.

52．Which of the following statements is TRUE?

A．Scientists are warning people noise can be harmful.

B．It's possible for man to get rid of all noises.

C．Sounds under 140 decibels are not considered to be noise.

D．Society has become more lively because there is noise now. 

—Did you make sense of what the man said just now?

—No, his meaning didn’t ______ ．Would you explain it to me?

Our sense of hearing is one of the most important means of knowing what is going on around us. We are warned of danger by sounds. The sounds of music please us. Sound has a waste product, too, in the form of noise. Noise has been called unwanted sound. Noise is growing and it may get much worse before it gets any better.

Scientists, for several years, have been studying how noise affects people and animals and are alarmed by what they have learned.

Peace and quiet are becoming harder to find. Noise pollution is no joke. It is a threat that should be looked at carefully.

Sound is measured in units called decibels （分贝）. At a level of 140 decibels people feel pain in their ears.

Trucks, buses, motorcycles, airplanes, boats, and factories all make noise. This noise bothers not only our ears, but our minds and bodies as well.

There is a saying about "it is so noisy that you can't hear yourself think". Doctors who study noise believe that we must be able to hear ourselves think most of the time. If we don't, we may have headaches, other aches and pains, or even mental problems. Noise adds even more tension to a society which already faces too much stress.

1．The sense of hearing _______.

 A．makes people feel angry   

 B．makes people want to dance

 C．helps people to know what is happening around them

 D．is something harmful to people

2．When sound is turned into noise, _______.

 A．people become ill                   B．it makes people forget the past

 C．people don't know how to deal with it  D．it becomes a kind of pollution

3．Why does the passage say " Peace and quiet are becoming harder to find " ?

A．Sounds of over 140 decibels are common these days.

B．There are always wars going on in the world.

C．The world is making more and more noise.

D．All kinds of machines make noises.

4．Which of the following statements is TRUE?

A．Scientists are warning people noise can be harmful.

B．It's possible for man to get rid of all noises.

C．Sounds under 140 decibels are not considered to be noise.

D．Society has become more lively because there is noise now.