用括号内所给动词的适当形式填空。

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.