--- What are you doing?
--- I'm writing a talk________computer.I'll give the talk tomorrow.
--- I'm writing my talk________tomorrow.
---“Shall we go to the park?”
---“________.”
---“Are you doing your homework?”
--What did you do on May Day?
--I went shopping with my family. There ________ so many people in the street.
---You aren’t a student, are you?
---No, I ________.
---Are you going to Zhujiang tomorrow?
---It all ________ the weather.
---Please _______to return my book by Friday. I'll use it on Saturday.
---No, problem. I'll finish reading it on Thursday.
---There isn't ________ milk in this glass.
---But there's ________ in that one.