小题1:How old is your sister? A. Thank you! 小题2:Hello, this is Mary speaking. Is that Tom? B. Sorry to hear that. 小题3:My mother is ill. C. Fifteen. 小题4:Your hat is very nice. D. No, not so nice. 小题5:What's the time? E. It's 6 o'clock. F. Speaking. This is Tom.