There is a mute who wants to buy a toothbrush. By imitating the action of brushing one's teeth, he successfully expresses himself to the shopkeeper and the purchase is done. Now if there is a blind man who wishes to buy a pair of sunglasses, how should he express himself?
He opens his mouth and says, "I would like to buy a pair of sunglasses."
If you got this wrong......you should not tell anyone.