Nowadays lots of people stop drinking cola because it is bad for our bones, especially for women's bones.

More and more people _________ to drink energy drinks（功能饮料）. Energy drinks look cool. Their makers say they give you energy and _________ you better at sports. So, many students drink them before exams to help them stay _________.

But wait! To keep you awake, most energy drinks have _________ caffeine（咖啡因）.They are like a strong cup of coffee or tea. If you drink a lot of them, your _________ will beat faster. You will feel nervous. You could _________ have sleeping problems and find it hard to live without them. Tom Brown is a _________ U.S. junior high school student. He drinks energy drinks every day. He started to do this a year ago before his piano lessons. But now, Tom says, “I drink them _________ I feel weak or before a test. I can't help drinking them."

In fact, the energy you get from the drinks helps for _________ a short time. You may feel good for an hour or so, but then you'll feel even __________ than before.