40. A. tired         B. worried        C. busy             D. happy

B

I have been collecting stamps since I was a little kid. I began to collect stamps  _41  I was eight years old. At that time, my mother  42  at an international bank.  Every Friday, she  43  home stamps from all the letters she had received during that week. I   44  had many pen friends in different countries, and we   45  letters to each other very often. By the  46  I was twelve, I had collected more than 1000 stamps from fifty different countries! I've  47   collecting stamps, but now it's more  48  My mother retire(退休) from her job, and my pen friends send me  49  messages instead of letters. The internet has been very 50   for my stamp collection!

39. A. come          B. stop           C. forget           D. try

38. A. fun           B. money          C. business         D. walk

37. A. last           B. each            C. next             D. some

36. A. back           B. out             C. in               D. up

35. A. looks for      B. answers         C. looks up         D. asks

34. A. ever           B. too             C. quite            D. even

33. A. work           B. office          C. house            D. station

32. A. spends         B. costs           C. takes            D. needs

31. A. As soon as     B. Wherever        C. As quickly as    D. Until