Mason said the technology already works and the biggest challenge now is getting down the cost for driverless vehicles from hundreds of thousands of dollars to something more affordable. He said this will happen as the technology is improved.

　　1.According to the passage, California Governor Jerry Brown ________.

　　A.is for the idea of having driverless cars

　　B.sponsored the DARPA competition to improve the driverless system

　　C.has already bought a new autonomous car

　　D.thinks that driving safety is the most important issue in his state

　　2.What is the role of the systems mentioned in Paragraph 3?

　　A.They can help cars run much faster.

　　B.They can take the place of drivers now.

　　C.They can make cars run without fuel.

　　D.They can help people drive more safely.

　　3.In Kendall's opinion, who probably don't rely on the driverless cars at first?

　　A.Managers in the high tech company Google.

　　B.Officers from the U. S. government agency DARPA.

　　C.Car consumers.

　　D.Vehicle designers.

　　4.According to Richard Mason, what is the biggest challenge for driverless cars?

　　A.They need to have more comfortable seats.

　　B.They are now too expensive for consumers.

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