根据句意和所给中文写出句中所缺的单词.

1. May I _____ (介绍) my best friend Amy to you, Sandy?

2. I think it's our _____ (职责) to protect the environment.

3. The cinema has _____ (出口) on its three sides.

4. Will you please pay _____ (注意力) to what I am saying?

5. How many _____ (客人) were there in yesterday's party?

保险合同订立要经过（）两个法定程序。

A.申请与定约

B.要约与协议

C.公开与公平

D.要约与承诺