Reading comprehension. Do you feel a little sleepy after lunch? Well, that's normal. Your body naturally slows down then. What should you do about it? Don't reach for a coffee! Instead, take a nap. There are many benefits of a daily nap. First of all, you are more efficient after napping. You remember things better and make fewer mistakes. Also, you can learn things more easily after taking a nap. A 20-minute nap can reduce information overload. It can also reduce stress, Finally, a nap may increase your self- confidence and make you more alert. It may even cheer you up. But, there are some simple rules you should follow about taking a nap. First, take a nap in middle of the day, about eight hours after you wake up, Otherwise, you may disturb your sleep-wake pattern. Next, a 20~30 minute nap is best. If you sleep longer, you may fall into a deep sleep. After waking from a deep sleep, you will feel worse. Also, you should set an alarm clock. That way, you can fully relax during your nap. You won't have to keep looking at the clock and you won't oversleep. Now, the next time you feel sleepy after lunch, don't get stressed. Put your head down, close your eyes, and catch forty winks. Choose the best answer from A. B. C or D according to the passage. 1．What is the main idea of this reading? [     ] A．Why children take naps. B．How to sleep deeply. C．Why napping is good. D．The problems with napping. 2．According to the reading, what is not a benefit of napping? [     ] A．It improves you memory B．It makes you feel happier. C．It gives you more self-confidence. D．It makes you stronger. 3．What is a good rule for taking a nap? [     ] A．Use an alarm clock. B．Nap eight hours after waking up. C．Sleep for about half an hour. D．All of the above. 4．What is the best napping schedule? [     ] A．Two 60 minute naps per day. B．One nap each day. C．Napping only in the evening. D．Napping only in the morning. 5．Which may occur if an alarm clock is not used? [     ] A．You may relax more. B．You may feel too nervous to relax. C．You may forget an important meeting D．You may not reduce your napping time.