阅读短文，回答问题．

　　Jim asks his friend Li Lei, “How many days are there in a week?”

　　“Why? Seven of course．Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday.” Li Lei answers．

　　“Well, Li Lei, can you name five days of the week and not say Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday．”

　　“No, I can’t．Can you? ” asks Li Lei．

　　“Yes, I can．They are today, tomorrow, the day after tomorrow, yesterday, the day before yesterday.”

1．________ is the first day of the week．

2．“of course ”的中文意思是________．

3．Can Li Lei name the seven days of a week?________．

4．How many days are there in a week?________．

5．If(如果)today is Thursday, then the day after tomorrow is ________．