6. 换元法

5. 常数分离

4. 复合函数法

3. 单调性法

2. 图象法

1. 基本函数法

值域

13.(★★★★★)There is only an English-Chinese dictionary in that book-shop.I wonder if you still want to buy________.

　　 A.it B.one C.another D.any

12.(★★★★)-Excuse me,but can you tell me which road I should take to the post office?

　　 -________of the four roads will do.

　　her C.Both D.Every

11.(★★★★)-Is ________finished?

　　 -Not yet.My dirty clothes are still soaking in the washing machine.

　　 A.something B.anything C.nothing D.everything