Lesson 79 By air 乘飞机 Read the passage and then answer the question
阅读短文,然后回答以下问题
Why did the plane turn back
I used to travel by air a great deal when 1 was a boy
My parents used to live in South America and I used to fly there from Europe in the holidays
A flight attendant would take charge of me and I never had an unpleasant experience
I am used to travelling by air and only on one occasion have I ever felt frightened
After taking off, we were flying low over the city and slowly gaining height, when the plane suddenly turned round and flew back to the airport
While we were waiting to land, a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down
Everybody on board was worried and we were curious to find out what had happened
Later we