[答案]
(1)Who'sthat(2)Whatareyoudoing(3)Isitinteresting(4)Whataboutyou/Whatareyoudoing(5)Goodidea
[解析]
(1)根据下句This is John.Hi,Mary.可知此处电话询问对方是谁。故填Who's that。
(2)根据下句I'm reading a book.可知此处询问正在做什么。故填What are you doing。
(3)根据下句No,I think it's kind of boring.可知此处询问这本书有趣吗?故填Is it interesting。
(4)根据下句I have nothing to do.How about going shopping?可知此处询问你在做什么?故填What about you/What are you doing。
(5)根据上句How about going shopping?可知此处提建议,回答用好主意。故填Good idea。
[点评]
本题考查了"打电话   ",属于"常考题",熟悉题型是解题的关键。