[填空题]Not until the ______ were the cars that could burn natural gas invented.

[填空题]Not until the ______ were the cars that could burn natural gas invented.

[单项选择]He could never be (content) until he could afford to buy that beautiful car.
A. full
B. rich
C. wise
D. happy

[简答题](Passage 1) Buffalo chips were found to burn evenly, hotly, and cleanly, with little smoke and, interestingly, no odor.

[简答题](Passage 1)
Buffalo chips were found to burn evenly, hotly, and cleanly, with little smoke and, interestingly, no odor.

[单项选择]Putting traffic signals inside cars could save fuel, a German researcher told at a conference in London last week. Dr. Ulrich Seiffert, who works for Volkswagen’s research division, was speaking at a conference on the future development of technology which had been organised by the Open University.
He said that a pilot scheme had just been installed in Wolfsburg by Volkswagen, in conjunction with Siemens and the local council. It would be tested over the next few months. The central feature of the scheme is a link between computer-controlled traffic signals and lights on the vehicle dashboard which tell drivers whether to slow down or speed up.
Each time drivers slow down they lose momentum, and so waste fuel when they accelerate again. Even when a group of traffic signals on a stretch of road are synchronised(同步) so that traffic at a set speed, normally around 45 km/h, always gets a green light, the full potential is not realised.
This is because drivers approaching a r
A. it employed such advanced electronic technology as that by Siemens
B. it has been developed by Volkswagen--one of the world’s greatest car makers
C. it electronically integrates the traffic signal and individual car
D. it will lead to a boost in global auto production

[单项选择]

Years ago our cities were full of cars, buses and trucks. Now the streets are completely congested (拥挤的) and it is very difficult to drive a car along them. Drivers must stop at hundreds of traffic lights. What are our cities going to be like in ten or twenty years Will enormous (巨大) motorways be built across them With big motorways cutting across them, full of noisy, dirty cars and lorries, our cities are going to be awful places. How can we solve the problem
There are some good ideas to reduce the use of private cars. In 1989, for example, the authorities in Rome began an interesting experiment: passengers on the city buses did not have to pay for their tickets.
In Stockholm there was another experiment: people paid very little for a season ticket to travel on any bus, trolley bus, train or tram in all the city.
In many cities now some streets are closed to vehicles, and pedestrians are safe there.
In London there is another experiment: part of t
A. They take a completely-free bus service.
B. They experimented a very cheap bus service.
C. Part of the street is for buses only.
D. They closed the streets to cars.