Do you know who invented tea? It is said that the emperor Shen Nong  discovered   tea when he was boiling drinking water 21 an open fire. Some leaves from a nearby tree fell into the water and the leaves were in the water for  22 . The emperor noticed that the leaves in the water produced a  23   smell. Later he decided 24  the hot water with the leaves. It was quite delicious. And  25 , one of the worl’s favorite drinks was invented.
26 is the home of tea. And tea has more than 4,000 years history. 27  the three drinks—tea, coffee and cocoa, tea is drunk by  28  people in the world. Tea  29 China began to be known by the world over a thousand years ago and has been an important Chinese export (出口商品) 30  .
Tea leaves  31  mainly in the south of the Yangtze River, 32 the warm climate (气候)there. Longjing, Wulong, Pu’er and Tieguanyin are all  33   kinds of tea.
Over the past centuries, Chinese people  34   their tea culture(文化), including tea planting, tea-leaf picking, tea making and so on. We know tea is  35   a popular topic(主题) in dances, songs, poems and novels.

Why are you always tired, do you know?

    First, if(如果) we can’t   31   well, we will(将) be tired. But we are often too   32   . We can’t finish our work in the day   33   we have to do it at night. We go to bed    34   and we get up early in the morning for school or work. Most people need at least(至少) eight   35   or some more. If we sleep for only five or six hours a night, we will be tired.

    Second, when we are ill, we will be tired. But we don’t know we are ill. So if you are always tired, maybe you are not so    36   . You’d better go to see a    37   .

    Third, maybe you eat    38    food, like hamburgers, meat, chocolate or coffee. If you are ill and tired after eating some food, please don’t eat it    39    to see if you are well. 

    At last, if the air around you isn’t nice and clean, you will feel tired. So please open your windows often or go out for a walk and you will feel    40    .

1.A. sleep        B. study         C. drink           D. eat 

2.A. busy         B. free          C. lazy(懒惰的)    D. angry 

3.A. because      B. if             C. so            D. although 

4.A. early         B. late           C. quick         D. quiet  

5.A. days         B. months        C. hours         D. minutes 

6.A. ill           B. nice           C. good         D. healthy 

7. A. movie        B. friend         C. teacher        D. doctor 

8.A. too much     B. too many       C. much too      D. many too

9.A. too          B. again          C. also           D. once 

10.A. better        B. best           C. good          D. well