根据短文内容和所给的首字母，写出所缺的单词，使短文完整，合乎情景。将完整的单词写在下面框内。

Teenagers live very busy lives now and often forget to think about their diets and exercise. The truth is, healthy eating along with regular exercise is the o　　 81 　way to keep fit.

During your teenage years, it is important to give your body the e　 82 　it needs. Teenage

girls need about 2,200 calories a day and boys need a bit m　 83　　 -- doctors suggest 2,800 for teenage b　　 84　 　. 50% of your calories should come from rice, bread, vegetables and fruit. You also need to drink a lot of water, 6 to 8 glasses a day. D　　 85　 　enough water will improve your skin and give you healthy hair.

E　 86　 　is something that can help to make you look good, feel good and be healthy. Experts (专家) suggest that teenagers spend at l　　 87 　30 minutes exercising, five times a week.

W　　 88　 　　you exercise, your body produces something that makes you feel r　　 89　 　. It can even help you sleep better at night and let you p　　 90　　 　more attention when your study!

75.　　 Mary ______　 _____ (拒绝)to do the work, so I had to ask John to do it instead.

74.　　 The old photo often _____　　 _____ (提醒) me of my childhood and my playmates.

73.　　 I feel sad when I think of my cat’s　　　 　　　　.(死)

72.　　 The teacher gave me many good_______　　 ____(建议)on my English study.

71.　　 Would you mind _____　　　 ____ (解释)this problem to me ?

70.　　 There was ___________ (happy) on her face after she heard the bad news.

C)根据句子意思及汉语提示，写出所缺的单词。

69.　　 I prefer ______________(have) Chinese food this time.

68.　　 I hope you think that my advice is worth ___________ (take).