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.

45. Everybody wants to be healthy and ______________(有吸引力的)

44. ___________(奇怪)enough, the boy went missing while the door and windows were still closed.