V. Read the following article and choose the best option A, B, C or D for each question. In the future, there will be many new (21) _________ of transportation. People may travel by flying cars or hot air balloons. (22) _________, at the present, a company is designing an electronic train. This train will have very little emission because it runs (23) _________ solar energy. It uses solar panel windows to generate electricity, so it can help the environment. This electronic train can carry up to 10,000 (24) _________, and it will be able to travel a distance of 600 kilometers in one hour. The price is 300 dollars for three people, not (25) _________ as a tram, but people can travel to different places faster. 21. A. ways B. means C. methods D. devices 22. A. However B. Therefore C. Otherwise D. Though 23. A. with B. by C. on D. in 24. A. pedestrians B. travellers C. drivers D. passengers 25. A. more cheap B. such cheap C. as cheap D. little cheap