What Is Caffeine（咖啡因）？
    Caffeine is something that you can find in some （1）d

rinks

rinks

，such as coffee and tea.Caffeine makes you feel more awake.It can also give you a short burst（爆發(fā)） of energy.Your （2）h

eart

eart

beats faster when caffeine is in your body.
    Why Can Caffeine Be a Problem for You？
    Like many kids，you probably （3）e

nioy

nioy

drinking cola very much.If you drink too much cola in a day，your body will get too much caffeine.Then，you might feel nervous or （4）w

orried

orried

，or be in a bad mood （情緒）.Or you might get an upset stomach and a headache.You can also have trouble（5）f

alling

alling

asleep at night.
    Why Should You Stay away from Energy Drinks？
    Energy drinks （6）u

sually

sually

contain（含有） the most caffeine.Some energy drinks have three times more caffeine than cola does.These drinks have far too much caffeine for kids.So，kids should drink milk，water or fruit juice，（7）b

ecause

ecause

these drinks don't contain caffeine.What's more，（8）c

hildren

hildren

shouldn't drink more than one can or glass of cola in a day or drink it too close to bedtime.
    It is better to get your energy from（9）h

ealthy

ealthy

food and drinks.In this way，you can have lots of energy to study，play and grow（10）w

ithout

ithout

doing any harm to your body.