听短文，根据短文内容选择正确答案。短文念两遍。
【小题1】How many situations does the speaker mention?

A．Only one.

B．Two.

C．Three.

【小题2】What does “I’m not sure.” really mean?

A．“I must go now.”

B．“I disagree.”

C．“I don’t know.”

【小题3】Who would say “Someone’s at the door.”?

A．The one makes a call.

B．The one answers a call.

C．The one wants to finish talking.

【小题4】According to the passage, what is the rule of the game of language?

A．Never say exactly.

B．Try to be nice to each other.

C．Always say what you mean.

【小题5】Why does the speaker give the examples?

A．To tell the people how to correct mistakes.

B．To show the importance of communication.

C．To make the people understand his idea easily.