植物的呼吸作用产生（　　）

A．水和无机盐

B．水和二氧化碳

C．淀粉和氧气

D．水和叶绿体

Hello, may I have an appointment with the headmaster?（）

A.Sorry, I don't know you 

B.No, you can't 

C.Certainly. Wait a minute, please 

D.Let me see