(3). (单选题) What does the underlined word “This” in paragraph 3 refer to?(本题0.0分)
A、 A satellite.
B、 A little rocket.
C、 A satellite seems to stay in the same place in the sky.
D、 The satellite puts the rockets in the right position.
出自:河北建筑工程学院-大学英语1(高起专)