阅读理解。

     A father asks his son, "How many letters are there in the alphabet?" "I don't know," says his son. His

father says, "You don't know? You are in school for many years and you don't know how many letters

there are in the alphabet?" He is very angry. His son says, "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?"

根据短文内容判断句子正（T）误（F）。

( )1. From this story, we know the son is good at English.

( )2. The son studies at school over (超过) one year.

( )3. The father gets angry because his son is not polite (有礼貌) to him.

( )4. The father knows how many letters there are in the post office.

( )5. There are twenty-six letters in the alphabet.

各企业、单位应根据各自经济业务的实际需要自行设置总账科目。