题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式(每空不多于3个单词)。

What should you do if you are not able to sleep? The best thing is to try to avoid bad habits．__1.__ you always go to bed and get up at about the same time，this will set a __2.__ (health)rhythm in your life．Don’t drink caffeine drinks in the evening．Smoking and alcohol can also keep you awake．You may have trouble__3.__ (sleep) if you have a heavy meal just before you go to bed．

You may also find it difficult__4.__ (get)to sleep if you have a problem or something else on your mind．This is __5.__ you need to relax．As you lie in bed，tense the muscles in your feet and then relax _6.__．Continue up the body，tensing and relaxing the muscles until you reach the heaD． Start with the feet again if you are still tense．If you __7.__ (think) about a problem or about something exciting that is going to happen the next day，get up and write about it．That will help to take it off your mind．You can also get up and read，but be sure to choose__8.__ book that is not too difficult．__9.__，you may get so interested that you won’t want to go to sleep even when you feel sleepy．

Sleep welt and have sweet __10.__ (dream)!