Listen! What can you hear? You may hear many different sounds．Some of those sounds may be noise．Noise is loud or unwanted sounds．

Noise call be caused by many kinds of machines，such as motor cycles，jet planes and tractors．And，to some people，rock bands can also brining noise．

What happens to people who live near noisy machines or use them for a long time? Doctors find that these people have trouble sleeping．But，most importantly，constant（持续的）loud noise can cause a loss of hearing．

Scientists use a unit of measure（度量）called decibel（分贝）to measure the loudness of a sound．The sound of a computer，for example，measures 35 decibels．Talking measures between 40 and 65 decibels．Sounds from traffic and from some rock bands can measures over 120 decibels．Noise at this high level causes the greatest hearing loss．

1．Noise can be caused by all the following except ________ according to the passage．

A．rock bands           B．tractors                C．jet planes                D．computers

2．“Decibel” is a ________．

A．unit that measures sound                          B．kind of noise

C．machines that makes very loud noise            D．person who hates noise

3．According to the passage，loud noise can ________．

A．help people sleep better                             B．make people work longer

C．make people deaf                                       D．make people happy and excited

4．Which of the following is TRUE?

A．Going to a concert is bad for our cars．

B．Not all sounds are noise．

C．The loudest noise comes from traffic and rock bands．

5．What's the main idea of this passage?

A．Noise pollution can be a serious problem．   B．Rock bands are noisy．

C．The way to measure noise．                        D．How to stop noise pollution．

阅读理解

　　Happiness is for everyone. You don't need to care about those people who have beautiful houses with large gardens and swimming pools or those who have nice cars and a lot of money and so on. Why? Because those who have big houses may often feel lonely and those who have cars may want to walk on the country roads at their free time.

　　In fact, happiness is always around you if you put your heart into it. When you are in trouble at school, your friends will help you; when you study hard at your lessons, your parents are always taking good care of your life and your health; when you get success, your friends will say congratulations to you; when you do something wrong, people around you will help you to correct it. And when you do something good to others, you will feel happy, too. All these are your happiness. If you notice a bit of them, you can see that happiness is always around you.

　　Happiness is not the same as money. It is a feeling of your heart. When you are poor, you can also say you are very happy, because you have something else that can't be bought with money. When you meet with difficulties, you can say loudly you are very happy, because you have more chances to challenge yourself. So you cannot always say you are poor and you have bad luck. As the saying goes, life is like a revolving door. When it closes, it also opens. If you take every chance you get, you can be a happy and lucky person.

1．Those who have big houses may often feel ________.

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2．When you fall down in a PE class, both your teacher and your classmates will ________.

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3．What will your friends say to you when you make great progress?

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4．Which idea is NOT TRUE according to the passage?

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A．People who have cars would never like to walk in the open air.

B．You can get. help from others when you make mistakes.

C．You can still be a happy person even if you have little money.

D．Happiness is always around you though difficulties come towards you.

5．Which of the following is this passage about?

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