Why are we always tired,do you know?Firstly if we can’t sleep 1 ,

Why are we always tired,do you know?Firstly if we can’t sleep 1 ,
Why are we always tired,do you know?Firstly if we can’t sleep 1 ,we will be tired.But we are often too 2 .We can’t finish our work in the day and we must do it 3 night.We go to bed 4 and get up early.So we can’t sleep well.Most people need at least eight 5 and some more.If we sleep for only five or six hours a night ,we will be tired.Seconly when we are ill we will be tired.But we don’t know we are ill.So if you are always tired,perhaps (也许) you are not so 6 .You’d better go to see a 7 .Thirdly,perhaps you 8 eat some kinds of food like eggs,nuts,meat,chocolates or coffee.If you are ill and tired after eating some food,please don’t ear it 9 to see if (是否) you are well.At last,if the air around you isn’t nice and clean,you will feel tired.So please open your windows often or go out for a walk and you will feel 10 .( C ) 1.A.good B.nice C.well D.fine ( A ) 2.A.busy B.free C.laze D.angry ( D ) 3.A.in B.on C.at the D.at ( B ) 4.A.early B.late C.quick D.quiet ( C ) 5.A.days B.months C.hours D.minutes ( D ) 6.A.ill B.nice C.good D.healthy ( D ) 7.A.movie B.friend C.teacher D.doctor ( D ) 8.A.can’t B.can C.don’t D.do ( D ) 9.A.too B.again C.also D.more