— Hello, may I have an appointment with the doctor?

— _____

A．Sorry, he is busy at the moment.

B．Why didn’t you call earlier?

C．Certainly, may I have your name?

D．Sorry, he doesn’t want to see you.

动画中用水扑救着火的汽油但无效果，其原因是汽油的密度比水小，因此油浮在水上面继续燃烧