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?