题目内容：

    A famous American website listed some of the world's most dangerous runways(跑道).Even experienced pilot may find it difficult to land on these runways. Here are two of them.

Princess Juliana International Airport Runway Princess Juliana International Airport is in St Maarten. It is one of the busiest airports in the Caribbean. The airport is famous for its runway. While a large plane needs at least 2, 400 meters to land safely, the runway is only about 2, 200 meters long. What's more, the runway ends right on a beach. This means planes will fly directly over the people on the beach. In fact ,planes fly only 20 to 30 meters above people's heads! A large number of tourists visit the beach every year. They get excited when planes cause strong winds and loud noise on the beach.

The Ice Runway The Ice Runway is in Antarctica(南极洲). It is made of ice.This has made it the worlds most slippery runway. Landing on the runway is a challenge. The ice will break if a plane is too heavy.So the weight of each plane must be checked very carefully. When the temperature rises, the ice melts. So, there's no runway at all at that time.

 

 

1.How long is the runway at Princess Juliana International Airport?

A.About 2, 400 meters B.About 20 meters

C.About 2, 200 meters D.About 30 meters

2.How do people feel when planes cause strong winds and loud noise?

A.Scared. B.Sad. C.Angry. D.Excited

3.Why do people check the weight of each plane flying on the Ice Runway?

A.Because the plane can't take off if it is too heavy.

B.Because the ice-made runway will break if the plane is too heavy

C.Because the plane can't land safely on the ice if it is too light.

D.Because all planes need to be checked before they take off.