完成对话，每空一词

A: Can I help you ?        

B: Yes,   1   . I'd like a sweater.

A: We have quite a few here. How   2   this one?

B: Good.   3     4   are they?          

A: Ten dollars.

B: OK. I'll    5   it. Thank you very much.    

A: You are   6  .

遗尿经常发生于

A．异相睡眠

B．正相睡眠第一期

C．正相睡眠第二期

D．正相睡眠第三期

E．正相睡眠第四期