.............. pencils.
These are pencils
............. are elephants.
These are elephants
a / an hour
an hour
a / an ruler
a ruler
............ an eraser.
This is an eraser
....... an eraser
That is an eraser.
......... pencils
Those are pencils
What is this?
This is a pen
a / an egg
an egg
............ a key.
That is a key.
a / an chair
a chair
............ is a ball
that is a ball
............. dictionaries
Those are dictionaries
a / an umbrella
an umbrella