Mr.Tom Forester livedby himself a long way from town.He hardly ever left his home, but one day hewent into town to buy some things in the market.After he had bought
them, he went into a restaurant and sat down at a table by himself.When he lookedaround, he saw several old people put glasses on before reading theirnewspapers, so after
lunch he decided to go to a shop to buy himself some glasses too.He walkedalong the road, and soon found a shop.
The man in the shop made him try on a lot of glasses, but Tom alwayssaid," No, I can't read with these."
The man became more and more puzzled （迷惑不解） , until finally he said, "Excuse me, but can you read atall?"
"No, of course I can’t!" Tom said angrily."If I was already ableto read, do you think I would have come here to buy glasses?"

What kind ofmistake did Tom make?

A.He went to the wrong kind of shop.

B.He didn't try on all the glasses in the shop.

C.He thought that a person who had not learned to read would be able to do soif he wore glasses.

D.He left his money in the restaurant