Поставить предложение в вопросительную и отрицательную форму there are children in the street; the cadet is at the desk; they get up at 7 o'clock; he wants to be a sailor

1. There are children in the street.

Are there children in the street?

There are no children in the street.

2. The cadet is at the desk.

Is the cadet at the desk?

The cadet isn't at the desk.

3. They get up at 7 o'clock.

Do they get up at 7 o'clock?

They don't get up at 7 o'clock.

4. He wants to be a sailor.

Does he want to be a sailor?

He doesn't want to be a sailor.