【正文】
30. feel well 31. stressed out 32. traditional Chinese doctors 33. a balance of 34. to be 35. for example 36. too much 37. much too 38. be easy to do 39. be important to do 40. a balanced diet 41. stay healthy 42. other healthy foods 43. at the moment 44. study late 45. conversation practice UNIT 3 46. babysit my sister 47. go camping 48. go with 49. go to Tibet for a week 50. go to Tibet in a week 51. show sb. sth./show sth. to sb. 52. get back to 53. go bike riding 54. go sightseeing 55. take walks 56. go fishing 57. rent