Like most kids,you probably don't spend much time worrying about heart disease. After all,hypertension tends to become more common as people reach middle age and older. But doc?tors say it's never too early to start thinking about your heart or about salt.

  Blood pressure has been going up over the past decade in children and teenagers in the United States and many European countries. And a kid with high blood pressure is more likely to become a grownup with hypertension.

  Cutting down on salt might help stop the cycle. In one recent study,researchers from the United Kingdom analyzed 10 trials involving nearly 1,000 kids. The trial results showed that lowering sodium intake by 40 to 50 percent led to a significant decrease in blood pressure,even in infants.

  Reducing salt might also help fight childhood obesity,a growing public health problem. British researchers recently found that kids who eat less salt also drink fewer sugary soft drinks. Drinking less soda makes kids less likely to gain weight,become obese and develop high blood pressure.

  And salt can affect more than just your heart and weight. A study published in October found that a growing number of kids in the U. S. are suffering from an illness called kidney stones. This painful condition used to mostly affect people in their40s and older. Now,kids as young as 5 are getting it.

  The kidneys are responsible for filtering salt out of the bloodstream. So researchers think that kids' eating too much salt and not drinking enough water are partly to blame for the trend.

(   ) 5. What's the main idea of the passage?

   A. Hypertension is the most popular disease among adults.

   B. People should reduce salt and sugary soft drinks.

   C. People should begin thinking about salt at present. .

   D. Salt will affect your heart and weight.

(   ) 6. If you want to lower the risk of getting heart attack,you'd better         .

   A. drink less and eat less every day if possible

   B. avoid eating too much salt but drink more soft drinks

   C. take regular examinations in the hospital

   D. reduce nearly half of the amount of the salt you take

(   ) 7. The whole text is developed by         .

   A. space   B. evidence   C. time   D. importance

(   ) 8. What may partly cause children to get kidney stones?

   A. Eating too much salt and drinking little water.

   B. Eating too much and doing little exercise.

   C. Sleeping too much and putting on weight.

   D. Taking in too much salt and fat.

 Canada is the second biggest country in the world. It has an area of about ten million square kilometers,1       most of the northern part of the North American continent and with a(n) 2       larger than that of the United States. Canada 3       to the southwest of Greenland. To the south,it 4       to the same latitude as southern France. The 5       from the Pacific coast in the west to the Atlantic in the east is greater than that from North America to Europe. But 6       its large size,twothirds of the population of Canada live in a 7       belt of land no more than 200 kilometers from the U. S. territory. In the east are the Great Lakes that lie on the 8        with United States. These huge inland seas 9        into the St. Lawrence River,which 10       them with the Atlantic Ocean. The 11       of government and finance is in Ontario. So are many of Canada's industries.

  Canada is a country of ten provinces and three territories. The first inhabitants of Canada were North American Indians and Inuit. France and Britain each 12        Canada to their rule in the past. At that time the population of Canada was almost 13        the French,but in the next few decades,thousands of British colonists 14        to Canada from the British Isles and from the American colonies. In 1849,the right of Canada to selfgovernment was finally 15       . To?day,18 percent of Canadians still speak only French.

Canada is often 16       a land of the future. The 17       is that the country's rich oil and mineral 18        have hardly been touched. It is among the ten 19        industrial nations of the world. Its capital is Ottawa and the largest city is Toronto. Other important cities 20        Montreal,Vancouver,Edmonton,Calgary,Winnipeg,Hamilton,and Quebec.

(   ) 1. A. making   B. recovering   C. covering   D. determining

(   ) 2. A. altitude   B. nation   C. area   D. water

(   ) 3. A. limits   B. lies   C. spreads   D. connects

(   ) 4. A. rises   B. wanders   C. grows   D. reaches

(   ) 5. A. distance   B. scenery   C. culture   D. atmosphere

(   ) 6. A. instead of   B. in spite of   C. as for   D. as with

(   ) 7. A. sensitive   B. wide   C. tight   D. narrow

(   ) 8. A. border   B. valley   C. forest   D. bank

(   ) 9. A. float   B. run   C. hide   D. fall

(   ) 10. A. surrounds   B. provides   C. links   D. combines

(   ) 11. A. centre   B. balance   C. connection   D. mixture

(   ) 12. A. protected   B. frightened   C. subjected   D. impressed

(   ) 13. A. originally   B. accidentally   C. usually   D. entirely

(   ) 14. A. turned   B. moved   C. devoted   D. led

(   ) 15. A. recognized   B. organized   C. honored   D. settled

(   ) 16. A. allowed   B. called   C. named   D. said

(   ) 17. A. fact   B. truth   C. reason   D. idea

(   ) 18. A. materials   B. resources   C. sources   D. energies

(   ) 19. A. leading   B. fortunate   C. possible   D. growing

(   ) 20. A. replace   B. conclude   C. represent   D. include

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