1. 按要求改写下列句子。

1. （1） I want to buy two bottles of orange.（对划线部分提问）

      do you want to buy?

3. （2） The boy ate two apples for breakfast this morning.（对划线部分提问）

     did the boy eat for breakfast this morning?
   

5. （3） Every day the boy has one bag of yogurt.（对划线部分提问）

     of yogurt does the boy have every day?
   

7. （4） You shouldn't arrive late for class. （改为祈使句）

     late for class.
   

9. （5） There are fifty students in our class.（对划线部分提问）

     students are there in your class?