A．Farewells 告别:

　　1、It's getting late. I must be going.

　　2、It's five o'clock already. I must be off now.

　　3、Oh, God, it's late, I've got to go.

　　4、It's time I was going, I'm afraid.

　　5、I think I must go now.

　　6、I think I'd better leave.

　　7、I'm glad to have met you.

　　B．Responses 回答:

　　1、Come again whenever you are free.

　　2、If you pass my home, drop in.

　　3、Good night, have a nice dream.

　　4、Can't you stay a little longer?

　　5、I hope we'll meet again sometime.