-- Come on, please give me some ideas about the project. -- sorry, with so much work _____ my mind, I almost break down.
----- Are you going there with them? -----If you go, ________.
There is _____ a pen, an eraser and some pencils in her pencil-box.
----- Is she a teacher? ------ Yes, _____.
How many _____ would you like?
----- Do you have ______ bananas? -----Yes, I have_____.