How many letters?

　　Father: How many letters are there in the English Alphabet?

　　Son: I don’t know.

　　Father: You don’t know? You are in the school for one year and you don’t know how many letters there are in the Alphabet?

　　Son: No. But let me ask you a question, Dad. You often go to the post office, please tell me how many letters there are in the post office?

　　快速判断：

　　1. There are twenty-six letters in the English Alphabet.

　　2. The son doesn’t study English well.

　　3. The son can’t answer his father’s question.

　　4. The father works in the post office.

　　5. There are twenty-six letters in the post office.