Thomas Edison tried two thousand different materials to make the light bulb. When none worked satisfactorily, his assistant　 31　 , “All our work is in vain. We have learned nothing. ”

　 Thomas Edison replied very　 32 , “Oh, we have come a long way and we have 　 33 a lot. We now know that there are two thousand materials which we cannot 34　 to make a good light bulb. ”

　 If we learn from our mistakes, then we are　 35　 . If we learn from someone else’s mistakes, then we are genius. Success is nothing more than a few simple disciplines 　 36　 daily and failure is nothing more than a few small　 37 　 repeated daily.

　 How　 38 the above lines are! Success takes 　 39 . We’ll make mistakes 40 　 we do things in too much of a hurry. When we do not practice disciplines in life, we don’t build enough confidence to 　 41 new and challenging tasks which are important and matter in life. Our confidence　 42 what we think of ourselves and whether we believe in ourselves. We are all born with exceptional　 43　 , but only a few really　 44　 their true potential and make efforts in life and the others just lead a(n)　 45　 life. Do you want to be exceptional?

　 Success is a fruit which everyone wants to 　 46　 but it is not found everywhere and no one can 　 47　 it without serious efforts.

　 Those who want to succeed will find a way; those who don’t will find a(n) 48　 !

　 Success depends upon previous　 49　 , and without it we will end in failure.

　 When you are　 50　 , please enjoy it and give your hand to others who want to accomplish something.

31. A. celebrated　　 B. complained

C. explained　　　　 D. answered

32. A. confidently　　　 B. madly

C. carelessly　　　　　 D. angrily

33. A. remembered　　 B. refused

C. learned　　　　　　 D. ordered

34. A. test　　 B. ignore

C. invent　　　 D. use

35. A. healthy　　 B. enthusiastic

C. intelligent　　　 D. generous

36. A. shown　　 B. prevented

C. recorded　　　 D. practiced

37. A. errors　　 B. machines

C. jobs　　　　 D. steps

38. A. common　　 B. strange

C. familiar　　　　 D. true

39. A. effect　　 B. time

C. drugs　　　　 D. roles

40. A. as though　　 B. so that

C. unless　　　　　 D. if

41. A. keep　　 B. attempt

C. give　　　　 D. see

42. A. depends on　　 B. sets aside

C. turns down　　　　 D. sets up

43. A. appearances　　 B. experiences

C. qualities　　　　　 D. feelings

44. A. own　　 B. realize

C. provide　　 D. research

45. A. active　　 B. hard

C. rich　　　　　 D. average

46. A. sell　　 B. draw

C. eat　　　　 D. praise

47. A. achieve　　　 B. watch

C. offer　　　 　　D. recognize

48. A. story　　 B. excuse

C. key　　　　 D. plan

49. A. preparation　　 B. influence

C. life　　　　　　　 D. generation

50. A. powerful　　 B. wonderful

C. successful　　　 D. hopeful

It is Saturday afternoon. You and your friends are planning to go to the movies and then spend the night together. Just as you start to get ready, your dad reminds you that it is your aunt's birthday and the whole family is going out to dinner to celebrate. How can this possibly end without a huge argument?

　　One of the greatest sources of tension (紧张情绪) between teenagers and their families is the struggle to balance personal desires with family expectations. As you are getting older, you are becoming more independent and more interested in being with your friends.

　　However，at the same time，your family is trying to figure out how to deal with these changes. While you once spent most of your free time with your family, you are now often absent from home. Parents may get their feelings hurt. Or they might feel that they are losing control of their family during this period. You might feel angry that so many family demands are placed on you.

　　There are a few things you can try to make it a little easier to ease (缓解) the tension.

　　* Make your plans in advance. Ask your parents if there is anything else planned at that time.

　　* When something with your friends interferes (冲突) with a family event，try to figure out if there is any way you can do both.

　　* Suggest something you would really like to do with your family. Sometimes parents feel better just knowing their teenager wants to spend time with them.

　　Some of the time you won’t be happy with the outcome (结果). You might either have to disappoint your parents or have to miss out being with your friends. However, if you show consideration for the feelings of both your family and your friends，you can solve the problem in a tender way.

The purpose of the first paragraph is to _________.

　　A. show a disagreement of views       B. serve as a description of teenager trouble

　　C. serve as an introduction to the discussion

　　D. show the popularity of teenager problem

The tension between teenagers and their families is caused by the fact that____________.

　　A. teenagers don’t like to take family demands

　　B. parents want to keep their family under control

　　C. parents feel unhappy that their children make so many friends

　　D. both parents and teenagers don’t pay attention to each other’s feeling much

What’s the purpose of the passage?

　　A. To inform us of parent and teenager tension.

B. To advise teenagers how to deal with their tension with their families.

　　C. To persuade parents to show consideration for teenagers.

D. To tell us about a common teenager problem.