1. Many people decided ________ (move) to the countryside because of much air pollution in the city.
2. Liu Xiang ________ (get) a gold medal at Athens Olympic Games in 2004.
3. ________ (not stand) too close to the wild animals. It's dangerous.
4. Dolphins are friendly. If you ________ (fall) into the water, they may come up to help you.
5. My little brother kept ________ (ask) questions about the Talking Robot while we were in the Science
    Museum.
6. The students are very glad they ________ (visit) Mount Emei the day after tomorrow.?
7. "Everybody ________ (have) to hand in the composition in class." said our teacher.
8. Please be quiet! We ________ (listen) to the songs sung by the "Super Girl" Li Yuchun.
9. In the last several years we ________ (set) up many new factories in our home town.
10. Great changes have already taken place in Yancheng. A second expressway (高速公路) ________ 
      (build) through the city a few years after the first one was done.