49. A. Less                   B. Most                        C. More                D. Less and less

48. A. based on             B. depended on             C. thanks to           D. be cause of

47. A. writes                 B. predicts                    C. gives                 D. coaches

46. A. made                  B. expected                   C. said                  D. wanted

   The number of cellphone users   51   460 million at the end of 2006,   52   67.77 million year on year. On average, there are 35.3 cellphones in China for   53   100 people.

   China had its first mobile phone users in 1987 and it   54   ten years for the number of subscribers to reach 10 million. Four years later, the country had the  55  population of mobile phone subscribers in the world.

44. He ______ me of that appointment for ten minutes! I won’t forget it.

   A. remind               B. has reminded     C. was reminding   D. has been reminding

43. ―Where did you put your car keys?

   ―Oh, I ______ I put them on the chair because the phone rang as I ______ in.

   A. remembered; come                          B. remembered; was coming

   C. remember; come                              D. remember; was coming

42. This washing machine is environmentally friendly because it uses ____ water and electricity than ___ models.

   A. less; older           B. less; elder          C. fewer; older       D. fewer; elder

41. You know he is not going to let us leave early if we ______ get the work done.

   A. can’t                  B. may not            C. shouldn’t           D. mustn’t