( )5. How many Asian countries are mentioned in the passage?

( )6. What does the underlined word "They" refer to?

( )7. Which of the following is TRUE according to the passage?

( )8. What's the passage mainly about?

5. B
6. B
7. B
8. D

5. 文章中提到的亚洲国家有Republic of Korea, China, Japan，共三个。
6. 根据文章最后一段“All of these birthday customs may be different, but the ideas are the same. They bring good luck to the birthday person.”可知，“They”指的是前文提到的birthday customs。
7. 根据文章中的“In Brazil, people like to eat candies on their birthdays.”可知B选项正确。A选项错误，因为文章中提到Republic of Korea的人生日时吃的是海藻汤和蛋糕，而不是面条；C选项错误，因为文章中提到UK的人生日时有时会在蛋糕里放一块糖果，而不是许多糖果；D选项错误，因为文章中提到Japanese通常不会邀请很多人参加他们的生日派对。
8. 文章主要介绍了不同国家的生日习俗，因此D选项“Birthday customs in different countries”最符合文章主旨。