The Middle East countries and other world powers have been facing major political tensions which have made the stability of the crude oil prices very unpredictable. Each day the prospect（前景）of oil prices has become more and more unclear.

Water fuel has been developed as an alternative source of fuel which has fast become popular around the world . This exciting technology has various advantages . More than 70 percent of the Earth is covered with water and this fuel source does not produce any harmful pollutants or dangerous emissions（散发物）either . They in fact also double the mileage（里程）of the cars that are powered by them .

Water fuel technology has been known to be the best additional form of fuel source for petrol or other fuel sources . However , any claim that this technology can be only an additional source and not a replacement is totally incorrect and misleading .such ideas have been implied by those who look down on this technology , On the contrary , this technology has numerous benefits such as it does not produce any harmful emissions which can affect the climate changes . It further helps to reduce the level of noise produced by the engines.

Various researches reflect that running costs on fuels for automobiles can be easily saved up to 40 percent with the help of water cell technology .This technology can easily work on various cars powered by gas . It can also be used for trucks , vans and other vehicles . The tap water can also be easily used directly and you do not need any special water that is specially treated to be used for this purpose . You can easily find a lot of details so that you can adapt your car to use the technology .

64. We can learn from the first paragraph that the price of oil______________,

A . has been rising for a long time   B is going down at present

C is unstable for political reasons   D is decided by powerful countries

65. Water fuel technology has many advantages EXCEPT that______________

A water fuel will not pollute the environment

B it is very simple to get such kind of fuel

C cars powered by the fuel can be used longer

D it has already been popular around the world

66. People holding the opposite idea think that______________.

A the world climate won’t be influenced by fuel

B petrol can’t be completely replaced by water fuel

C the engines will give out less noise than before

D water fuel can’t act as an additional source for gas

67.What is the best title for the text?

A. Water Fuel-Becoming a Reality Now        B. Water Fuel-Lower Cost

C. Water Fuel-a Long Way to Go              D. Water Fuel-a Safer Choice

108 cities in China took part in World Car Free Day on Saturday to promote environmentally-friendly transport and ease increasingly grid-locked city streets．It's a highlight of a nationwide urban public transport week．People were urged to take public transport，ride bikes or walk．

To help out，more than 200 new buses took to the streets．And the Beijing Subway laid on 10 more trains for rush hour．

A Beijing resident said, “Today is Car Free Day，and I do find the traffic much better and the bus can go much faster．”

Another resident said，“I spent only half an hour to go to work．It took me twice as long before． And  I can find seat on the bus today．”

But in some areas not signed up for traffic control，endless lines of cars can still be seen．

Some people say they just can't do without their cars．

Another Beijing resident said,“Some people are willing to give up driving，but on certain days when I have to take my child to school or weekend classes，the public transport is so bad that I can't do it without a car．”

But the concept of“green”traffic is catching on ．People say they believe it's the first and honest step in facing the serious traffic and environmental problems．

A driver said，“The Car Free Day has a very important symbolic meaning．It does not mean that we must give up cars．It is to promote a concept，to encourage more people to contribute to the protection of the environment．”

The Ministry of Construction calculates“Car Free Day”will cut 3000 tons of emissions(散发物) and save 33 million liters of gasoline．And it's planning more frequent activities to raise public consciousness of energy conservation and environmental protection．

69．The best title of the passage is possibly“        ”．

    A．Private cars are banned in cities

    B．Car Free Day pushes“green”transport

    C．Residents can't do without cars

    D．Residents should ride bikes on Car Free Day

70．Car Free Day will bring the following benefits except          ．

A．saving quite a lot of energy

B．environmental protection

C．improving road traffic

D．facing more serious traffic problems

71．What do you think is possibly the author's attitude towards the Car Free Day?

A．Positive．    B．Negative．    C．Passive   D．Critical．