练习材料：

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 in the holidays. A flight attendant would take charge of me and I never had an unpleasant experience. I am used to traveling 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 learnt that there was a very important person on board. The police had been told that a bomb had been planted on the plane. After we had landed, the plane was searched thoroughly. Fortunately, nothing was found and five hours later we were able to take off again.

任务配置：L0 +L4

笔记：

1.知识点

（1）A flight attendent would take charge of me…我总是由一位空中乘务员照管……

    flight attendent空中乘务员；

would表示过去经常发生的事；

take charge(of)为固定短语，表示“接管”、“开始管理”等

（2）…only on one occasion have I ever felt frightened.……只是有一次把我吓坏了。

　　这是一个倒装句。倒装句的结构为“副词+助动词(be, do, have, can, must等)+主语+句子的其余部分”。它通常用来加强语气，是典型的正式修辞和正式文体。用倒装句的情况包括：

①句首为否定或近似否定的副词(never,

rarely, little, on no occasion, hardly, no sooner…than等)；

②句首为only构成的词组(如 only after, only then等)；

（3）gain height,(飞机)增加高度，爬高。

　　gain在这里为及物动词，表示“增加”

（4）touch down,(飞机)着陆，降落

（5）Everybody on board was worried …飞机上的人都很着急……

　　固定短语on board表示“搭乘(船、飞机、火车、汽车等)”、“在(船、飞机、火车、汽车等)上”