Keeping Fit We all need(31) _____exercise to keep fit. But if we study all day, we dont have time to run, swim, lift weights,

Keeping Fit
We all need(31) _____exercise to keep fit. But if we study all day, we dont have time to run, swim, lift weights, or(32) _____basketball. What can we do to stay(33) _____shape?
One thing we could do is walk(34) _____often. Walking is good exercise. Instead of going to school(35) _____car or bus, we could walk. During recess, we could go outside and stroll around before we go back to class. Instead of taking the elevator in buildings all the time, we could use the stairs.
Another important thing is to take(36) _____from studying. If we sit at our desks or in front of a computer(37) _____a long time, we should stand up and stretch our arms and legs(38) _____each hour. If we stand for a long time, we should sit down and stretch our backs.
These are just a(39) _____ways we can stay fit when we dont have a lot of time to exercise. Do you know some (40) _____ways?
31. A. regularly B.regular C. irregular D. irregularly
32. A. play B. do C. make D. keep
33. A. at B. to C. in D. for
34. A. least B. most C. less D. more
35. A. by B. on C. in D. at
36. A. absence B. exercises C. marks D. breaks
37. A. since B. about c for D. with