题目内容：
A. like B. in C. around D.to E.towardWhen it comes _____1 gravity,the larger an object is,the stronger its force is.A person creates gravity but not enough to pull objects ____2 him or cause things to go into orbit ___3 him.On the other hand,a planet has enough gravity to pull objects into orbit around it.A star makes enough gravity that it can pull whole solar systems into its orbit,____4 ours.Our sun.s gravity is so strong that it keeps an object-Pluto-that is roughly 3.7 billion miles away____5 orbit.
参考答案：