The passage is about a letter    1     (write) by LiQiang who is taking    2    the prize that he won last year. At first he was nervous and     3     (certain) about the journey. However, with WangPing’s guiding, LiQiang was transported into the future     4    (safe). Hit by a lack of fresh air, his head ached and he tried to make the necessary adjustment to this new situation. Soon he was back     5    his feet again and flew after WangPing in a hovering carriage     6    (drive) by computer. Arriving at WangPing’s house, LiQiang was shown into    7    large room made of trees,     8    leaves provided the room with oxygen.     9    (exhaust), LiQiang slid into bed and only then     10    he fall fast asleep.