完形填空(共15小题，每小题2分，共30分)

　　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.

　　( )21.A.thing

　　B.problem.

　　C.trouble

　　D.matter

　　答案：A

　　( )22.A.cause

　　B.make

　　C.bring

　　D.turn

　　答案：B

　　( )23.A.daily

　　B.weekly

　　C.monthly

　　D.quarterly

　　答案：A

　　( )24.A.Until

　　B.Unless

　　C.When

　　D.If

　　答案：D

　　( )25.A.may

　　B.must

　　C.could

　　D.would

　　答案：B

　　( )26.A.pair

　　B.set

　　C.few

　　D.number

　　答案：D

　　( )27.A.LOng

　　B.short

　　C.quick

　　D.slow

　　答案：A

　　( )28.A.change

　　B.break

　　C.support

　　D.form

　　答案：D

　　( )29.A.reading

　　B.writing

　　C.editing

　　D.translating

　　答案：A

　　( )30.A.done

　　B.divided

　　C.driven

　　D.drawn

　　答案：C