32. get good grades取得好成绩　　

31. of course=certainly=sure当然

30. come home from school放学回家

29. try to do sth 尽量做某事

28. want sb to do sth想某人做某事

27. want to do sth 想做某事

26. be bad for对什么有害

25. be good for 对什么有益

24. junk food垃圾食物

23. eat less meat吃更少的肉