五、根据句意及汉语提示完成单词（每小题2分，满分10分）

46. We should take an active part in _______（保护）the environment.

47. Which animals are in _______（危险）? Do you know, Mike?

48. They are doing a lot of _______（研究）to protect animals.

49. We hate war and love the _______（和平）.

50. His English teacher looks kind of _______（瘦的）.

六、句型转换（每小题1分，满分5分）

51. My father got up early so that he could catch the first subway.（改为同义句）

My father got up early_______ _______ _______ catch the first subway.

52. Thanks for taking care of my little son.（改为同义句）

Thanks for_______ _______my little son.

53. The boy needs to see the doctor.（改为一般疑问句）

_______ the boy _______ to see the doctor？

54. Most birds have a safe place to live in.（改为否定句）

Most birds_______ _______ a safe place to live in.

55. To think of that poor man is sad.（改为同义句）

_______ _______to think of that poor man.

七、书面表达（满分20分）

目前，老虎数量正在日益减少。为了它们的肉、皮毛，人们捕杀它们。这样做是违法的，因为老虎是人类的朋友，我们应该保护它们。请根据以上提示，并结合你的想法，写一篇题为“How to protect tigers”的文章，词数60左右。

提示词：illegal adj.不合法的；违法的