The earth is our home. We must take care of it. Life today is easier than it was        years ago, but it has brought some new problems. One of the biggest problems is pollution（污染）. We can see it, smell it, drink it and even       it. Man has polluted the        . The more people, the more pollution.Many years ago, the problem was not so serious because there were not so       people. When the land was used up (用光), the river was not clean in a place,man went to       place. Now man is slowly polluting the whole world       pollution is still the most serious, it’s bad for       things in the world.Many countries don’t le t people burn       for air in houses and factories in the city. Pollution by SO2 is now the most dangerous kind of       pollution. It’s caused by heavy traffic. People say it’s       to ride bikes. When you are       , there is no pollution. But even in developed countries, most people don’t go to work by bike. It’s not      bikes are expen sive or people are tired if they ride to work. It’s because the number of cars on the roads becomes larger. So more people       their bikes and go to work by cars,  then things are getting       . We should have special roads only for bikes and make it       difficult and expensive for drivers to take their cars into the city that they will go back to use their bikes. 

1.A. hundred       B. hundreds of      C. hundred of      D. hundreds 

2.A. listen         B. listen to         C. hear of        D. hear 

3.A. moon          B. star               C. earth             D. sun 

4.A. lot            B. little             C. many             D. much  

5.A. others        B. the others       C. the other        D. another  

6.A. Air           B. Food              C. Water            D. Noise  

7.A. life           B. live              C. living            D. lives 

8.A. something bad              B. bad something  

C. something good              D. good something 

9.A. water           B. air             C. noise          D. white 

10.A. least           B. best            C. most             D. worst 

11.A. driving       B. biked           C. riding           D. ridden 

12.A. why             B. because          C. what              D. how 

13.A. put on          B. look at         C. put away        D. look up 

14.A. better and better              B. more and more  

C. worse and worse                     D. bigger and bigger 

15.A. quite            B. such              C. very               D. so

 

Mrs. Green is telling her experience：

The brain is the most amazing part of our bodies．But just like our bodies，it needs care．Getting a good night's sleep．eating a balanced diet（均衡饮食）and taking deep breaths are all important ways of looking after both your body and your brain.

Many people think their brain will slow down with age and their memory will get worse．The truth is，just like your body，you can also improve your brain．I've found I can improve my memory by picturing what I need to remember．For example，if I'm going shopping and I need bread milk and a birthday card for my brother，I picture a loaf of bread，a bottle of milk with a cow in the front and a birthday card with a football on it．

The same kind of thing can be used with important dates．If you have a picture in your mind of a special event（事件），it's much easier to remember than just a number．

Another way of improving your mind is to make sure you often visit new places and have new experiences．I find learning Spanish is a great way to keep the brain working，but communication in any language is important．

1．What is the woman’s main aim in telling her experience?

A．To explain how the brain works．   

B．To talk about problems with the brain．

C．To describe how clever she has become．

D．To tell ways to make the memory better．

2．How does the woman improve her memory?

A．By doing some medical research．   

B．By looking after her body．

C．By picturing what she needs to remember．

D．By doing a lot of shopping．

3．What does the woman say about her own memory?

    A．It has been possible to make her memory better．

    B．She finds dates more difficult to remember than numbers．

    C．It has got worse over the years．

D．She often forgets birthdays．

4．Which would be the best title for the passage?

    A．Easy ways Io improve your mind

    B．The latest research into the brain

    C．The amazing power of memory

    D．How to remember things you thought you'd forgotten