阅读短文，然后按要求完成各题。

　　Many Americans find silence uncomfortable during a dinner．So in the United States, people often make a“small talk”in certain social situations．Small talk is about different topics, only for keeping a conversation going．The topic might include the weather, sports, college lessons, clothing, food, etc．Small talk is very useful in social situations when you meet someone for the first time, or when polite conversation is expected and no serious discussion is wanted．

　　It's common but not necessary expected that one knows someone in a group before talking with him or her in conversation．In fact, at a party,“May I join you?”and a self-introduction is useful enough to get a welcome from a group and to join in a conversation．In some places, such as a concert hall or a theatre, a waiting room or a classroom, it is common for strangers to start a conversation even without an introduction．

　　People in the United States expect those whom they speak to stop whatever they are doing and listen．

　　As a rule, the conversation distance between two people is at least two or three feet．Standing very close will make Americans feel uncomfortable．

1．Why so people make“small talk”in American?

People use it to ________．

2．What topics are often used in“small talk”?

The topics include ________．

3．What do you do if you want to join in a conversation at a party in the USA?

We can say ________ and ________．

4．What do Americans expect those to whom they want to speak to do?

They want them to ________．

5．Do you think serious discussion is wanted between strangers in social situations in the USA? Why or Why not?

________________________