英语阅读理解(判断正误"T"or"F")

英语阅读理解(判断正误"T"or"F")
Mr Tang asks his son,"How many letters are there in the Alphabet?" "I don't know," says his son.Mr Tang says,"You don't know?You are in school for one year and you don't know how many letters are there in the Alphabet!" He says angrily(生气的）.
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 are there in the post office?"
翻译：
唐先生问他的儿子:“字母表里有多少个字母?”“我不知道”,说他的儿子.唐先生说,你在学校一年了,你不知道字母表里有多少个字母!”他愤怒地说(生气的).
他的儿子说,“没有.但让我问你一个问题.爸爸,你经常去邮局,请告诉我邮局里有多少封信?”
( )1.There are twenty-six letters in the Alphabet.
( )2.Mr Tang's son doesn't learn English well.
( )3.Mr Tang's son can answer his father's question.
( )4.There are twenty-six letters in the Post office.
( )5.Mr Tang doesn't work in the post office.