---参考答案---
1-5 BABCB 6-7 BA 8-9 BA 10-11CB 12-14 CBA
15-18 CACA 19-21CBC 22-25ACCB
26.15/fifteen 27.porridge 28.mutton 29.jogging 30.October
31-35 DBADC 36-40 BADCD
41.has 42.in 43.feet 44.mine 45.twice
46.or 47.groups 48.at 49.of 50.to keep
51.us 52.but 53.an 54.helpful 55.better
56.C 57.C 58.D
59.C 60.C 61.D
62.D 63.A 64.D 65.B
66，B 67.D 68，C 69.D 70，D
71.The school uniform is a kind of clothes for students only./A kind of clothes for students only.
72.Students can look tidy when they wear their school uniforms./ They look tidy.
73.Tina.
74.She thinks students have to wear their school uniforms on important days at school./ On important days at school.
75.I like Lucy's opinion.Because wearing school uniforms can make students look tidy and clean.(合理即可)
76.What would you like to eat?/...
77.I'd like some beef dumplings./...
78.Do you have soup?/...
79.Yes, there are some potatoes in it./...
80.Thanks./...
81.例文
As we all know, health is very important in our life.I try my best to be a healthy teenager.
Firstly, I have healthy eating habits.I hardly eat junk food.To keep a balanced diet, I have different kinds of food such as fruit, vegetables, and meat.Secondly, doing sports is another way for me to keep healthy, On school days, I do exercise like running and playing basketball.On weekends, I usually swim or play badminton with my family.
The main reason why I keep the habits is that they can help me keep fit.Staying healthy enables me to make good use of my time and enjoy my life.Let's be healthy teenagers together!
---Good luck---
