1. 根据本部分所学单词及提示，写出所缺单词的正确形式。

1. （1） Don't hurry; there is a time to get to the airport.
3. （2） You have the a of marrying or remaining a bachelor. 
5. （3） Helen groups all people into two c: those she likes and those she dislikes.
7. （4） Dogs have an a sense of smell.
9. （5） The lion is called the king of (野兽).
   
11. （6） They built a(n) (简陋的) shelter out of tree trunks.
    
13. （7） He reached some (不确定的) conclusions about the possible cause of the accident.