Подскажите правильно составлены предложения?

What kind of planet is the Earth?Where does an astronaut live to work?How often do astronauts fly to the Moon?How many are there astronauts in the space station?

1. What kind of plannet is the Earth?

2. Yes

3. How often do austronauts fly to the Moon?

4. How many astronauts are there in the space station?

Объяснение: