下列字母中先后顺序排列正确的一组是 .
--- Who is over there in the dark?---_____. What you saw is just a chair.
--- What do you think of Alice?--- She’s a lively child and ________ with everyone of us.
--- Why do you always put this book in your backpack?--- Because this book ________ my interest in the study of history.
--- Are you going to buy the camera?--- I ________, I don’t have money enough on me.
--- What are you talking about?--- We are discussing ________.