I used to travel by air a great deal when I was a boy. My parents used to live in South America and I used to fly there from Europe during holidays. An airhostess would look after me and I never had an unpleasant experience. I like traveling by air and only once I have ever felt frightened. After taking off , we were flying low over the city and slowly gaining height(逐步升高）when the plane suddenly turned round and flew back to the airport. While we were waiting to land, the airhostess told us to keep calm and to get off the plane quickly as soon as it had touched down. Everybody on board was worried and we wanted to find out what had happened. Later we learned that there was a very important person on board, and the police were told that a bomb(炸弹）was on the plane. After we had landed,the plane was searched thoroughly(被彻底搜查）. Fortunately, nothing was found and five hours later we were able to take off again.
When did the writer visit his parents?

A．On weekends.

B．During holidays.

C．When he missed them.

D．When his parents invited him.

How did the writer like most of his plane trips?

A．Unpleasant.

B．Happy.

C．Frightened.

D．Worried.

What did the airhostess ask the passengers to do when the plane was landing?

A．To sit calmly after the plane landed.

B．To sit quietly when the plane landed.

C．To get off quickly after the plane landed.

D．To sit quietly after the plane landed.

Why did the plane land soon after it took off?

A．Because an important person wanted to take the plane.

B．Because something was wrong with the plane.

C．Because the police wanted to put some things on the plane.

D．Because the police were told a bomb was on the plane.

Which of the following is TRUE?

A．The plane stayed at the airport for five hours before taking off again.

B．The writer’s parents lived in Europe when he was young.

C．The police found only one bomb on the plane.

D．The writer had several such experiences.