There are different ways in which people try to deal with the problem of energy. One way is the greater production of common energy sources(能源), such as coal, oil and gas. The trouble with these sources, however, is that they are not renewable.

　　Another way is energy conservation(节能), which means using energy more efficiently(有效地). In some very cold countries people build special houses to save energy. They place materials between the inside and the outside of the walls of the house to keep the cold out and the warmth in. The house is heated by the lights, the body heat of the people and the other equipment in it.

Finally, renewable energy sources are used even though they are often expensive to develop. One form of these is geothermal energy. In certain parts of the world the temperature of the earth increases thirty degrees centigrade with each kilometre down. At six kilometres, therefore, it rises to nearly two hundred degrees. To get the heat, water is pumped(压;抽)down into the rocks and back up to the surface. Heat from the earth is already used in certain countries.

68 How many ways of dealing with the energy problem are discussed in the text?

  A.Two　　　　　    B.Three  　　　　      C.Four　　　        D.Five.

69.The writer tells about the "special houses" because they __________

　A.show the excellent skills of the builders

　B.serve as an example of energy conservation

　C.are heated by different sources of energy

　D.are warmer than other types of houses

70.The underlined words geothermal energy in the third paragraph mean________　　　　   

A.renewable source　　　　　 　　     B.underground source

　C.heat inside the earth　　　　　         D.temperature of the earth

71.At a place where the surface temperature is 15℃, how deep do you have to dig so as to get a temperature of 75℃?

　A.One km.　　  B.Two km.　         C.Three km.　　　      D.Four km.

The new machine，if _________ properly，will work at least ten years.

　 A. use 　 B. using

　 C. being used 　 D. used

JINTAN,JTANGSU:The 20 students 18 boys and 2 girls — had a thousand reasons to be proud of themselves. They had just climbed their way to the top rung(阶梯) out of 4 million students taking part in the Fifth National Hua Luogeng Gold Cup Mathematics Contest (竞赛)Tuesday evening.

　　The 20 gold medal winners are all primary and middle school students under the age of 14.

　　‘Many of the problems are of college level and these pupils can figure them out. It is just unbelievable! ‘said a teacher from Guangdong province.

　　Named after China’ s most famous mathematician, Hua Luogeng, the contest started in 1986, one year after his death. In less than 10 years, it has been recognized by the State Education Commission (国家)as the country’s biggest and best contest of its kind.

1. This news story is mainly about .

　　A. when the contest started

　　B. how the contest got its name

　　C. the 20 pupils who have won gold medals in the contest

　　D. the 5th National Hua Luogeng Gold Cup Mathematics Contest

2. This news story most probably appeared in a news paper in .

　　A.1995　　B. 1987　　C. 1986　　D. 1997

3 Ii can be inferred from the text that the teacher from Guangdong province .

　　A. felt proud of the gold medal winners

　　B. wondered if the students were honest

　　C. thought that the problems were too difficult for the 　students

　　D. believed that the twenty winners could go to study at university

4 The underlined phrase ‘figure out’ in the text means .

　　A .guess　　B. add up　　C. work out　　D. study

He just does what he pleases and never _____ about anyone else. 　

1. A.
   think
2. B.
   thinks
3. C.
   thinking
4. D.
   thought

They are subject to your　　　,but the final list is to be sent to the manager for his　　　.

1. A.
   obedience;approval
2. B.
   approval;agree
3. C.
   approval;approval
4. D.
   conformity;approval