Generate a sentence that answers this question: "Human astronauts have visited".

Answer: the moon is the celestial object that is closest to the Earth

Generate a sentence that answers this question: "Which is true?".

Answer: if an object is hot then the surfaces of that object are hot

Generate a sentence that answers this question: "The Earth's topography varies widely from the deepest trenches to the tallest".

Answer:
the surface of the Earth contains mountains