【正文】
Jack didn39。t finish his homework, __27__ he is going to finish the homework first every is going to __28__ less time watching TV and playing puter about __29__? I39。m going to exercise more to keep fit, because exercise is very 39。m going to get up early and exercise three times a week. 21. B. habits C. ideas D. hobbies 22. B. harder C. less D. further 23. B. hardly C. ever D. always 24. B. pieces C. ways D. kinds 25. B. fish C. junk food D. rice 26. up B. look after C. find out D. bring out 27. B. because C. though D. when 28. B. pay C. make D. cost 29. B. me C. mine D. my 30. B. serious C. similar D. important A B D D C B A A C D