题目内容：

根据下列句子及所给汉语词语，在句子空白处写出每个单词的正确形式（每空只写一词）。

1.In China, it’s impolite to use chopsticks to hit an e________ bowl.

2.We call the persons who are between 13 and 19 t_____   __ ___.

3.–W____________ book is this?  -- It’s John’s.

4.He began to ______     __(招待) others very nicely.

5.The ____       __ (第一)China – South Asia EXPO opened in Kunming on June 6,2013.