题目内容：

    The $380,000 aircraft, called the "Speeder", will be able to reach at least 150 miles per hour and have a 45-mile range and fly as high as 15,000 feet when it is on sale next year, according to David Mayman, CEO of JetPack Aviation, one of the companies that create and sell flying vehicles. This motorcycle can take off vertically (垂直地) from the grassland or a street and land on the other side of the city in a similar position. This idea has always been treated like science fiction.

At some point, the Speeder could be adapted to use electric energy, which is more environmentally friendly, but for now, Mayman said, no battery cells come close to the speed and potential power created by jet engines. Besides, like other developing similar craft, currently the Speeder will only be used for recreation and sport until laws and regulations begin to change in America.

Mayman argued that there was a large role for the Speeder to play in both civilian and military life. He said his company has been working for several years to develop a jet pack that could be used by Special Forces soldiers. As their cost continued to increase, he said, engineers began designing a personal aircraft that eventually turned into the Speeder.

Mayman said that the aircraft could be used to transport heavy loads or move soldiers on and off the battlefield, especially in areas too dangerous for helicopters. Unlike other flying vehicles, the craft is small enough to sit on the back of a boat or can be easily delivered by a common fighting vehicle.

1.What can we infer about the Speeder according to paragraph 1? ______

A.It can fly 150 miles without stop.

B.It is created by several companies.

C.It has already appeared in markets.

D.It can land on a school playground.

2.What limits the use of the Speeder at present? ______

A.The financial crisis.

B.The government policy.

C.The bad environment.

D.The technology development.

3.What was the Speeder first intended for? ______

A.Sports games.

B.Military force.

C.Electrical engineering.

D.Public transportation.

4.What advantage does the Speeder have when compared to other flying vehicles? ______

A.Its high speed to move heavy loads.

B.Its potential to use electric energy.

C.Its ability to replace helicopters.

D.Its small size that makes it convenient.