题目内容：

One day in May, our teacher told us that we would visit an air force base (空军基地). I thought the base was about hard and _____training. It would be no fun to spend several hours there.

However, as soon as I saw the bombers (轰炸机), I ____ my mind (想法). I thought it was a special feeling  ____I got close to the huge “birds”.

Our teacher there was an airman. He______us how the bombers worked. He also said it_____ China lots of money and a very long time, ten_____, to make its bombers.

We also visited the airmen’s rooms and took a close look at _____everyday life. I was deeply impressed (使印象深刻) by their clean rooms.

I think it is really good_____ students to visit an air force base and experience a base life. When we see the airmen, we know how great they are. It can help us to_____ self-discipline (自律). It is really an unforgettable  __ . Every Chinese should learn from them.

1.A. boring B. interesting C. expensive D. cheap

2.A. believed B. accepted C. changed D. showed

3.A. if B. when C. because D. although

4.A. asked B. offered C. made D. told

5.A. gave B. sent C. took D. allowed

6.A. years B. months C. weeks D. days

7.A. our B. their C. his D. your

8.A. to B. with C. at D. for

9.A. forget B. imagine C. learn D. describe

10.A. experience B. holiday C. dream D. competition