55. It’s getting dark. I’ve __________ __________ (不得不)go. It is nice meeting you all. Keep in touch.

54. J.K. Rowling, the British author of the record-selling Harry Potter s__________, said she planned to start writing the final book about the boy wizard in January.

53. On hearing that London was attacked by the terrorists, all the G8 leaders were deeply c__________ about the safety of the people.

52. Can you think of a s__________ where you can use this word.

51. I spoke to him at school, but he i__________ me.

50. Nowadays we c__________ with each other by sending e-mails.

49. The doctor advised the patient to get rid of(摆脱) his bad h__________ of smoking.

48. She never tells lies. So I know he is worth my t__________.

47. The t__________ came soon after the lightening.

46. He didn’t pass the exam, so she looked very u__________.