阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。
The passage is about a letter written by Li Qiang who is taking up the prize that ______ won last year. At first he was nervous and _______ (certain) about the journey. However, with Wang Ping’s guiding, Li Qiang ______(transport) into the future safely. Hit by a lack of fresh air, his head ached and he tried to make the necessary ______ (adjust) to this new situation. Soon he was back _______ his feet again _____ flew after Wang Ping in a hovering carriage _______ (drive) by computer. Arriving at Wang Ping’s house, Li Qiang was shown into _____ large room with a green wall made of trees, ______ leaves provided the room with oxygen. ______ (exhaust), Li Qiang slid into bed and fell fast asleep.