Areyoufeelingtiredinclasseveryday？Areyoufeelingthatyouloseattentioninclass？Areyoufeeling"brain（大脑）dead"sometimes？Well，ifyouanswer"yes"tothesequestions，youarenotsleepingenough．Butyoua

　　Are you feeling tired in class every day？Are you feeling that you lose attention in class？Are you feeling"brain （大脑）dead"sometimes？

　　Well，if you answer"yes"to these questions，you are not sleeping enough．But you are not alone．Many people thought the world haven't got enough sleep，especially students．Getting enough sleep is good for your health，so try the following ways．

　　Use your time wisely （明智地）

　　You should make plans of things you want to get done．Never wait till the last moment to study for an exam or finish a task because you are only hurting your body in the long run．

　　Sleep like a baby

　　Remember when you were a child and your parents asked you to take nap（小睡）？Taking nap is important to you if you lose sleep during the night．

　　Sleep more，suffer （遭罪）less

　　You shouldn't make yourself suffer any longer．So tonight，clear your mind and try to get a few more hours of sleep than you did the nights before!

　　So how much sleep do you need？Researchers have done an experiment．They put people in an environment without clocks or windows and ask them to sleep any time they feel tired.95percent sleep between seven and eight hours out of every 24．

　　46．If you are feeling tired，maybe___．

　　A．you are sleeping too much

　　B．you aren't sleeping enough

　　C．you are sleeping enough

　　47．What should we do if we have lots of things to do？___

　　A．Work hard at them．

　　B．Make plans of things we want to get done first．

　　C．Never do till the last moment．

　　48．What's the meaning of"sleep like a baby"in the passage？___

　　A．Sleeping all day．

　　B．Taking nap during the night．

　　C．Taking nap when losing sleep during the night．

　　49．How much advice does the writer give us in the passage？___

　　A．Three pieces

　　B．Two pieces

　　C．Many pieces

　　50．What does the writer tell us in the passage