How much are these shoes? _________ twenty dollars.
You ____ touch an electric fire. It's dangerous.
—_______. Where is the bank?— It's over there by the post office.
The Great Wall of China is _______ wall in the world.
Think of a number, _______don't tell me what it is.
— I am just going to the _____. Do you want anything?— Yes, a bag of rice.