题型：填空题 题类：常考题 难易度：困难
新疆石河子市第二中学2015-2016学年高一下学期英语期末测试
Have you ever (stay) up late? If so, you know that not getting enough sleep can make you tired. Not sleeping enough can also make hard to think clearly the next day.
Sleep scientists have long known that getting a good night's sleep is of great (important). It helps kids to be able (do)their best during the day.
A recent study shows that sleep (help) improve problem-solving skills and (create) thinking. For the study, two groups of students answered math problems. The group that slept for eight hou rs solved the problem (correct) more often than the group that did not get enough sleeping.
While you sleep night, your brain is busy doing its “homework”. It sorts out (整理) the information you get in the day. Getting enough sleep each night can improve your thinking ability. That will surely help you do your best at school. Experts say that, in return, can lead to better grades.
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