描述太空生活 — 英语词汇题
题目
根据句意和中文提示，补全单词，描述太空生活。1. Astronauts eat special f______（食物）in space. 2. In the space station, everything f______（漂浮）around. 3. Astronauts must do e______（锻炼）every day to keep healthy. 4. They sleep in a s______（睡）bag at night.