The dust is so thick that the men left footprints wherever they walked. Those were the first footprints any living thing had ever made on the moon. And they could stay there forever! There is no wind or rain to wipe them away.
The two astronauts walked on the moon for four hours. They picked up rocks for earth scientists to study. They dug up dirt to bring back to earth. They set up machines to find out things scientists wanted to know. Then they climbed back into their moon-landing craft.
The next day the landing-craft rockets roared as the two men blasted off from the moon. They joined Michael Collins in the space ship that waited for them above the moon.
Then, they began the long trip back to earth. Behind them they left the craters, plains, and tall mountains of the moon. They left the machines they had set up. And they left footprints that may last forever.
15. What is the text about?
A. Two men who successfully landed on the moon.
B. The moon-landing craft used by astronauts.
C. People’s visits to the space through t he moon
D. The craters, plains and mountains third of the moon