题目内容：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Are energy drinks safe? In spite of the dangers 1. (know) to us all, the market for energy drinks is booming. The Global Energy Drink market 2. (expect) to teach $72 billion by 2024. This is great news for energy drink producers, 3. what are consumers really getting when they buy these drinks?

Energy drinks can cause dehydration (脱水). The main source of energy in most energy products is caffeine, 4.increases urine (尿) production. People shouldn’t consume more than 400 mg of caffeine per day, but energy drink producers are not required by draw 5. (list) the amount of caffeine their products contain.

Energy drinks can increase heart rate. Caffeine contributes 6. a heart rate risk, says nutritionist Lisa Cohn, who found that energy drink abuse among teens 7. (cause) increased risk of heart attack, especially in those with potential heart conditions

Energy drinks can damage 8. (tooth) Most energy products contain large amounts of citric acid (柠檬酸), which is particularly 9. (harm) to enamel (牙釉质). In fact, the 10. (lose) of enamel after exposure to energy drinks is more than twice higher than after exposure to sports drinks.