Have you ever stayed up late? If so, you know that not getting enough sleep can leave you tired and grumpy . Not sleeping enough can also make it harder to think clearly the next day. Sleep experts have long known that getting a good night’s sleep is important. It helps kids perform their best during the day. A recent study shows that sleep helps improve problem--- solving skills and creative thinking. For the study, two groups of volunteers answered a math problem. The group that slept for eight hours solved the problem correctly more often than the group that did not get enough sleep. While you sleep, your brain is busy doing its “homework”. It sorts out information from your day. Getting enough sleep each night can boost your brainpower. That will help you do your best in school. Experts say that, in return, can lead to better grades. 小题1:What is the best title for the passage? A．Too Much Sleep B．It’s Homework Time C．Sleep to Succeed D．Math Problems 小题2:The underlined word “boost” in paragraph 5 means ________. A．reduce B．improve C．disturb D．worsen 小题3:Why is sleep important? A．It can improve problem-solving skills and creative thinking B．It will help you do your best in school C．It helps your brain sort out information from your day. D．All of the above 小题4: What did the results of a recent sleep study show? A．People who sleep enough are good at math B．Sleep is important for learning C．If you get enough sleep, you don’t have to do your homework D．Adults need more sleep than kids