the wealth of the country increases, more waste will be produced.
----- 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_____.