As you may know，the best way to keep yourself physically fit is to exercise every day.The. (21__________) is that you should (22 __________)physical fitness part of your (23__________) routine.It is the same.with mental fitness. ( 24__________ ) you want to be able to think well and to learn well，you (25__________ ) exercise your mind daily.
As with phsical fitrtess，there are a (26__________ ) 0f activities you can do to keep in contro1.However，over the (27__________ ) run，the very best way to exercise your mind is to (28__________) the habit of readin9.Here is why.Think of the difference，between watching television and (29__________ ) a book. Watching television is a passive experience.You sit，you look，and you listen.Such concentration is (30 __________) by outside stimulation(刺激).Reading.a book，on the other hand.requires (31__________) concentration.As you read，you must，put in a great deal of effort to look at the words,(32__________)0ut what they mean，and build、.up images，thoughts and opinions within your (33__________) Druing your reading，if you stop concentrating，even (34 __________) a second, eyerything stops.Nothing happens，until you start concentrating again.For this reason，reading regularly forces you to (35__________) your powers of concentration，a skill whose value would be difficult to overpraise.