动词填空选用括号内所给的动词，并用其适当形式填空，每词只许用一次。

(talk, help, read, cost, keep, change, do, visit, go, sit )

1. ________ it ________ much to live here? 　　

2. The teacher looked at the clean classroom and said we ________ a good job. 　　

3. The Smiths ________ greatly in the last two years. 　　

4. He heard her singing aloud in the next room, so he ________ in a louder voice. 　　

5. It was said that some foreigners ________ our class the next week. 　　

6. They have done what they can ________ us stop the sandstorm. 　　

7. Why are there so many people over there? Let's go and see what ________ on. 　　

8. My family ________ at table when the door bell rang. 　　

9. It's very cold in the room. Let's make a fire ________ us warm. 　　

10. What do you think ________ about at the meeting tomorrow?