Swain said that wave power still costs too much money. She also said that its effects on sea animals are still unknown. What is more，wave power could affect fishing and boat traffic. Traditional sources of energy like oil and gas may someday run out.“Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is rising rapidly throughout the world，”Swain said. In the future when you turn on a light, an ocean wave could be providing the electricity!

　　1．The writer uses the two questions at the beginning of the passage to________.

　　A．test the readers' knowledge about waves

　　B．draw the readers' attention to the topic

　　C．show Jamie Taylor's importance

　　D．invite the readers to answer them

　　2．The underlined phrase “picking up”is closest in meaning to________.

　　A．starting again B．speeding up

　　C．improving

　　D．gathering

　　3．We can make better use of wave energy if we________.

　　A．shorten its journey to thousands of homes

　　B．build more small power stations on the oceans

　　C．reduce the cost of turning it into electric power

　　D．quicken the steps of producing electricity

　　4．It can be inferred that someday we might not worry about________.

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