1. 句型转换

1. （1） There's only a little water in the river. （对划线部分提问）

     water is there in the river?

3. （2） Our school organizes an English speech contest once a year.（对划线部分提问）

     does your school organize an English speech contest?

5. （3） To plant trees every year is necessary for us.（改为同义句）

     for us to plant trees every year.

7. （4） Shall we have a picnic at the weekend?（改为同义句）

     having a picnic at the weekend?

9. （5） My brother drinks milk every day.（改为一般疑问句）

     your brother milk every day?