三、完形填空：共15小题，每题2分，共30分。通读下面的短文，掌握其大意。然后，从每小题的四个选择项中选出可填入相应空白处的最佳选项。
In the past, I always thought that being a teacher was an easy job. But I changed my ___21___ when I became a part-time teacher. About four years ago, Richard asked me ___22___ I could help teach his students how to make a website about themselves.
I ___23___ because computer is what I do well and I didn’t think teaching computer would be that ___24___ .
But when I taught Richard’s class, some of the students ___25___ with their friends while I was explaining how to do something. At first I just got angry with them, ___26___ Richard taught me to think why they were doing this. He said that if he was ___27___ a lesson and the students were not listening, then he was angry with ___28___ for not making the lesson clear or interesting for them. I told him that I didn’t ___29___ his idea. He then asked me if I had ever ___30___ the same thing. That made me stop. Of course I had!
If any of my past teachers are ___31___ this, I want to say sorry if I sometimes played around in the class ___32___ you were teaching. I didn’t think how that would make you feel. I promise I will do my best to be a good ___33___ in the future. Please help us when we don't understand and most ___34___ , don’t be quick to be angry when we fail. ___35___ of us are perfect but with your help we can be successful.
21. A. plan B. decision C. choice D. mind
22. A. where B. why C. whether D. when
23. A. agreed B. failed C. obeyed D. admitted
24. A. dangerous B. wise C. interesting D. hard
25. A. performed B. worked C. chatted D. travelled
26. A. or B. But C. for D. and
27. A taking B teaching C. learning D. preparing
28. A. itself B. me C. them D. himself
29. A exchange B. like C. know D. receive
30. A. accepted B. said C. done D. thought
31. A reading B. meaning C. writing D. saying
32. A. when B. until C. after D. since
33. A worker B. student C. businessman D. engineer
34. A seriously B. probably C. surprisingly D. importantly
35. A. None B. Any C. Most D. All
