---________ I open the window? It's so warm here.
---All right.
---Is that ball large?
---________.
---Happy Teachers' Day, Mr Wu!
---Shall we go at 9∶00?
---No, let's make ________ half past eight.
---I want some ________.
---Could you ________ me, please?
---Look at ______ picture.It's funny and interesting.
---Which one do you mean?______ big one on the right.
--- What happened to Paul?
--- He was crossing the street ________ a motorbike hit him from behind.
---______ bag is this?
---It's mine.
---What's this in English?
---It's a ________.