【正确答案】
D
【答案解析】[听力原文]
We have just climbed out of a spaceship onto the surface of the moon. Behind us is the ship, half in the sunlight and half in deep shadow. A few miles ahead is a wall of mountains towering against the black sky. And there, as though resting on the mountains, is a great ball of light, beautifully colored in blue and green and brown with a patch of dazzling at the top. It is our own faraway world — the earth.