Do you often feel a little sleepy after lunch? Well，that's normal．Your body naturally slows down．What should you do about it? Don't drink coffee，take a nap（打盹），instead．

There are many advantages of a daily nap．First of all，you can remember things better and make fewer mistakes．Also，you can learn things more easily after taking a nap．A 20-minute nap can reduce（減少）your pressure（壓力）．Finally，a nap can make you cheerful．

But there are some simple rules that you should follow about taking a nap．You should take a nap at noon，about eight hours after you wake up．In general，a 20-minute nap is the best．If you sleep longer，you may fall into a deep sleep．After waking up，you'll feel worse．Also，you may set an alarm clock．That way，you can feel fully relaxed during the nap．You don't have to keep looking at the clock so that you don't oversleep（睡過(guò)頭）．

Now，the next time you feel sleepy after lunch，don't get stressed．Put your head down，close your eyes and have a short sleep during the daytime．

Fill in the blanks according to the passage．Only one word for each blank．

When you feel a little sleepy after lunch，you should take a nap（1）         of drinking coffee．After twenty（2）        nap，you can remember things better，make fewer mistakes，learn things more easily．It can reduce your pressure and cheer you up．But if you don't（3）                                       _______  the simple rules，you won't feel（4）        ．In order to（5）         yourself during the nap，you should set an alarm clock to wake you up on time．