55. Whether Arafat was m　　　　　 　or died naturally is still unknown to the world yet.

54. The police are trying to find the w　　　 　　　to the accident.

53. Looking at her p　　　　 　expressions, I see that she still hasn’t understood the problem.

52. He made a new 　　　　　　　(科学的) discovery.

51. The child can’t use chopsticks (筷子)　　　　　　　　 (恰当地).

50. I was　　　　　　　 (失望) at the result. He failed in the exam.

49. The English teacher praised the girl for her having made great p______________ .

48. The dog was f________________ , so the children dared not get close to it.

47. A____________ to Tom, Jane got married last month.

46. Mona Lisa’s m____________ smile attracts so many people in the world.