Change the forms of the following sentences. 句型转换。
1. Running is exercise.（对划线部分进行提问）
2. Twenty-four hours make a day.（对划线部分进行提问）
3. Is here any good food ?（变为陈述句）
4. I never eat vegetables.（对划线部分进行提问）
5. The melon is here.（对划线部分进行提问）
1. What is exercise ?
2. How many hours make a day ?
3. Here is some good food.
4. How often do you eat vegetables ?
5. Where is the melon ?