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閱讀理解。

　　Have you ever traveled on any of the new planes? If you have not been a passenger on one of these planes, try to imagine(想像). a plane which is more than seventy metres long and more than five stories high at the tail. Such plane costs at least twenty-five million dollars to build. It costs at least $ 6,000 to fill this giant with fuel(燃料).

　　Inside the giant plane looks more like a great theater than a plane. It has six kitchens, and they are all needed when the plane is full of passengers. The plane holds more than 400 passengers. Imagine that number in one plane!

　　Is there any danger that the plane's engines will fail? Fortunately, the planes appear to be quite safe on each plane there are twice as many engines as the plane needs. If two engines fail on the same side, the plane can easily use its other engines to land. There are also two mechanical pilots(機械領航員) to take change if the human pilots can not fly the plane.

1．This article mainly(主要) talks about________.

[　　]

A．the costs about the new plane

B．the safely to travel on the new plane

C．a new way to fly

D．the danger of traveling on a new plane

2．From the article we know the new plane is________.

[　　]

A．very large and comfortable

B．very long and beautiful

C．quite fast but dangerous

D．quite high but very crowded

3．This new plane has ________.

[　　]

A．a theatre

B．a kitchen

C．at least 400 seats

D．more than 400 passengers

4．Which of the following is NOT true?

[　　]

A．$ 6,000 is needed to fill up the plane.

B．There are only two engines for the new plane.

C．One plane can hold 400 passengers.

D．The plane seems to be quite safe.

5．The plane can land safely because________.

[　　]

A．if the engines on one side fail, the plane can use its other engines

B．there is no danger at all

C．the mechanical pilots can take the place of the human pilots to fly the plane

D．both A and C