单选题 A second-hand car costs a ______ of a new one.

单选题 The symbolic pull of the mission will ___ more with the masses: The list of unexplored locales in our solar system just got a little shorter.

单选题 Chang'e 4 will therefore be able to ___ its surroundings in great detail, probing the composition of the surface and the structure of the ground beneath the lander's feet.

单选题 It takes the moon about the same amount of time to ___ once on its axis as it does for the natural satellite to orbit the Earth.

单选题 We all are anticipating the Olympic Games to be held in Beijing, and the more exciting is the Olympic Torch will be ___ in our city.

单选题 The far side is a much tougher target for surface exploration, because the moon's rocky bulk would ___ direct communication with any landers or rovers there.

单选题 Chang'e 4 ___ eight science instruments: four apiece on a stationary lander and a mobile rover.

单选题 The rebel forces ___ a surprisingly successful attack against the better equipped government troops.

单选题 The US New Horizons probe ___ past the distant object Ultima Thule just after midnight on Jan. 1