题目内容：

NASA might be famous for sending rockets up to space quickly. But it will be more famous for making your next holiday come more quickly.

The space agency is working on a new plane, which could solve the problems of supersonic(超音速的) flight and vastly increase the speed of journeys abroad. If successful, the plane would be able to fly between New York and London in just three hours. And it would reduce the time spent flying other journeys by a half, since it could be used more broadly. Until now, the problem with such planes has been the sonic boom(声爆), made famous by the original Concorde. That happens when a plane reaches supersonic speeds.

It is a thunderous noise that upsets people on the ground— disturbing animals and even causing physical problems to materials and houses underneath. It was that effect that led Congress to ban such planes from being used over the US land, a decision that in turn was responsible for Concorde’s failing to be commercially used.

In view of the problem, the space agency has developed a new technology and tried it out in wind tunnels, and now believes that it could be put to commercial use. That plane will fly as high as 55,000 feet—far higher than normal planes—and make a sound of only 60 decibels. That’s far less than 90 decibels thrown out by normal planes, and is roughly in line with a car on the motorway or a busy restaurant.

“As long as we can get endorsement from the general public, the plane will probably be something that’s acceptable,” said Peter Coen, project manager for NASA’s commercial supersonic research team, in a new Bloomberg report. “If we get approved, we will have the full-sized version of the plane tried out and the plane will be put into use.”

1.Why does the author mention Concorde?

A. To suggest the rapid development of planes.

B. To stress the negative effect of sonic booms.

C. To introduce how a commercial plane is designed.

D. To show Congress’ important role in making planes.

2.What is the fourth paragraph mainly about?

A. The basic data of the new plane.

B. The working principle of the new plane.

C. The problems of the new plane.

D. The potential market of the new plane.

3.What does the underlined word “endorsement” in paragraph 5 mean?

A. Response

B. Commitment

C. Investment

D. Agreement

4.What is the purpose of the passage?

A. To inform people of NASA’s new plane.

B. To prove the disadvantages of supersonic flight.

C. To explain why speed matters in supersonic flight.

D. To clarify some misunderstandings about commercial planes.