When people talk about air pollution, they are usually thinking about outdoor air   46  . But do you know that there is also air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have   47   to do with polluted indoor air.

A lot of pollution comes from indoor activities   48   smoking and cooking. As most people  49   about 80%-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.

Air pollution influences our health 50  . When the air is polluted, not only young children and old people  51   from it,  52   people with health problems suffer as well. Indoor air pollution can   53   people’s eyes, noses and throats. Air pollution, both indoor and outdoor, can also  54 lung cancer and heart disease! In the great London fog in 1952, 4, 000 people died in a few days  55   the pollution! It is said that half a million young children and women die each year in India because of indoor air pollution!

(   )46.A.pollution               B.pollute                       C.polluted

(   47.A.nothing                 B.everything                 C.something         

(   48.A.as well as              B.such as                            C.instead of          

(  )49.A.take                B.cost                          C.spend                

(   50.A.in many ways        B.in many things           C.in many houses  

(   51.A.bear                      B.stand                         C.suffer

(   )52.A.and                      B.but                            C.or                     

(   )53.A.hit                       B.hurt                          C.pollute               

(   )54.A.cause                   B.get                            C.give                         

(   )55.A.because of           B.thanks to                   C.because

   When people talk about air pollution, they are usually thinking about outdoor air   1    . But do you know that there is also air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have    2    to do with polluted indoor air.

   A lot of pollution comes from indoor activities    3    smoking and cooking. As most people    4    about 80-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.

   Air pollution influences our health    5   . When the air is polluted, not only young children and old people suffer from (遭受) it,    6    people with health problems suffer as well. Indoor air pollution can    7    people's eyes, noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer（肺癌）and heart disease! In the great London fog in 1952, 4,000 people died in a few days    8   the pollution! It is said that half a million young children and women die each year in India because of indoor air pollution!

1. A. pollution                     B. pollute                     C. polluting

2. A. nothing                          B. everything                   C. something

3. A. as well as                      B. such as                     C. instead of

4. A. take                           B. cost                         C. spend

5. A. in many ways                   B. in many things             C. in many houses

6. A. and                       B. but                         C. or

7. A. hit                        B. hurt                         C. polluted

8. A. because of                   B. thanks to                    C. related to

You speak, write a letter, make a telephone. Your words carry a message. People communicate with words. Do you think you can communicate without words? A smile on your face shows you are happy or friendly. Tears in your eyes tell others that you are sad.

When you put up your hands in class, the teacher knows you want to say something or ask questions. You shake your head, and people know you are saying "No". You nod and people know you are saying "Yes". Other things can also carry messages. For example, a sign at the bus helps you to know which bus to take. A sign on the door helps you where to go in or out. Have you ever thought that there are a lot of signs around you and that you receive messages from them all the time? People can communicate in many other ways. An artist can use his drawing to tell beautiful mountains, about the blue sea and many other things. Books are written to tell about all the wonderful things in the world and also about people and their ideas. Books, magazines, TV, radio and films all help us communicate with others. They can help us to know what is going on in the world and what other people are thinking about.

1. People communicate ________.

A. with words only                    B. in many different ways

C. in letters and drawings               D. with smiles, tears and hands

2. Signs can carry as many _________ as words.

A. questions　          B. examples        C. tears and smiles      D. messages

3. Which of the following is not talked in the passage as which can help us communicate?

A. books and magazines   B.TV and films     C. newspapers　       D. radio

4. Communication is important because it can help people to ______.

A. understand the world and other people better around us.

B. teach each other to speak, write, read and draw.

C. know what other people are thinking about

D. learn about mountains, blue sea and other things.

5. The best title（题目）for this short passage is _________.

A. Signs Carry Messages                 B. The important Communication

C. Words, Signs and Drawing                    D. Ways of Communication.