单选题 It can be seen that if a rocket misses its target, it keeps on traveling through space until ______.

A、 it burns up
B、 it is caught in the gravitational field of another planet
C、 it is brought back to the Earth by scientists
D、 it runs out of fuel

【正确答案】 B

【答案解析】[解析] 本题的依据句是“A rocket fired at the moon and continuing in the direction in which it was fired would miss the moon by a wide margin and perhaps continue to drift out into space until‘captured’in another planet's gravitational field．”从中可知B项为正确答案。