【正文】
31. were playing 32. has been away 33. were you born 34. didn39。t go 35. was put 36. has gone 37. laughing 38. bring 39. had visited 40. es 41. standing 42. seeing 43. is going to be 44. Must 45. left 46. to read 47. to have…h(huán)ad worked 48. waiting 49. is being built 50. playing 51. to do / to have done 52. cooking 53. looked 54. Help yourself to 55. to be laughed at 24. sleeping 25. sank 26. had been broken in to / stolen 27. would have met 28. giving /shavingsgiven 29. telling 30. doing 31. were playing 32. has been away 33. were you born 34. didn39。t go 35. was put 36. has gone 37. laughing 38. bring 39. had visited 40. es 41. standing 42. seeing 43. is going to be 44. Must 45. left 46. to read 47. to have…h(huán)ad worked 48. waiting 49. is being built 50. playing 51. to do / to have done 52. cooking 53. looked 54. Help yourself to 55. to be laughed at