阅读理解。 Just A Quick Nap Do you feel a little sleepy after lunch? Well, that's normal.  Your body slows down then. What should you do about it? Don't drink coffee! You should take a nap. It's good to have a daily nap.  First of all, you are more efficient (有效地) after napping. You remember things better and make fewer mistakes. Also, you can learn things easily after taking a nap. A nap may increase your self-confidence (自信) and make you more active. But, there are some rules you should follow about taking a nap.  First,  take a nap in the middle of the day,  about eight hours after you wake up.  Next, a 20-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. Now, the next time you feel sleepy after lunch, don't get stressed out. Put  your head down and close your eyes. 1.  People often feel _______ after lunch. A. happy B.  bored C.  sleepy D. hungry 2.  After taking a nap, you may feel more________. A. active B.  strcssed C.  angry D.  tired 3.  How long should you take a nap? A.  8 minutes. B.  20 minutes. C.  8 hours. D.  20 hours. 4.  What can help you fully relax during your nap according to the passage? A.  A cup of coffee. B.  A big meal. C.  An alarm clock. D.  A deep sleep. 5.  What is the passage mainly about? A. Why and how to take a nap. B.  How to make your body slows down. C.  Rules to make fewer mistakes. D.  How to remember things better.