How Many Letters? (Tom and his father are at home.) Father: How many letters are there in the English Alphabet(字母表)? Tom: Sorry, I don't know(知道). Father: What? You are in school for one year. Tom: Yes, but you are in the post office(邮局) for eighteen years. How many letters are there in the post office? Father: Sorry. I don't know. Tom: Haha. You are not a good postman. |