王芳 Hi! What a surprise meeting you here!
刘丽 Yeah,it's really a coincidence.Are you coming to buy some books?
王芳 No.There is a lecture here today.I'm coming to listen to it.
刘丽 What kind of lecture?
王芳 The lecture about how to improve your English.
刘丽 Oh.But do you think it's useful to listen to a lecture?
王芳 I don't know.I have nothing else to do anyway,so I'm going to listen to it and kill some time.