1. Most _______ (busy) letters are written in English. 2. Project hope is an _______ (organize) that helps children go to school. 3. He is one of _______ (famous) actors in our country. 4. The principle will give us a _______ (speak) tomorrow afternoon. 5. There will be a musical _______ (perform) in the show. 6. The girl often give out leaflets _______ (ask) people to donate money. 7. It was my job _______ (introduce) each star. 8. I _______ (help) with a charity show this time last week. 9. This is the best model I _______ ever _______ (see) . 10. I hear the show _______ (hold) in a middle school next week. 11. A new bridge_______ (build) in my hometown last year. 12. I hope _______ (be) a doctor after I know something about ORBIS .