1 . It is predicted that the Chinese space station will be built mostly by machine. China hopes to have the space station    1     (complete) by 2022 and it is expected to operate for at least 10 years.

China also plans to land a probe（探测器）on Mars by 2020. Until now, China has completed a   total of five manned space missions. And,   in 2003,it       2     (successful)landed a probe on the moon.