1 . 用所给词或短语的适当形式填空

hang;   unless;   collect;   cheap;   take place;   exact;   play;   ill;   check;   enjoy

1. The World Health Organization (WHO) cures, prevents and controls serious ________ such as malaria (疟疾), and educates people about how to protect their health.
2. If it rains tomorrow, we ________ inside.
3. Pierre de Coubertin, a Frenchman, was the founder of the International Olympics Committee (IOC) and is known as the father of the modern Olympic Games which ________ in 1896.
4. No matter what kind of music you love, you can take part in World Music Day for free and you can also encourage everyone you are familiar with ________ it.
5. —Didn’t you see the red light?
—Sorry, sir. I ________ the map and didn’t notice it.
6. Sally is hard-working, and she hardly ever ________ out on school nights.
7. In many parts of the world, solar energy is now the ________ form of electricity.
8. ________ you work hard, you will not succeed.
9. —After the exam, there’s the school-leavers’ party. We’re all looking forward to it.
—________! We’ll have a great time.
10. Stamp ________, for example, write to people in different countries so that they can collect the stamps on the letters they receive.