1 . The scientist’s a__________ (假定，假设）that the new compound would be stable at high temperatures was later proven incorrect. （根据中英文提示拼写单词）

3 . To b__________ (促进) her energy levels before the marathon, she drank a sports drink with electrolytes and caffeine. （根据中英文提示拼写单词）

4 . The astronauts’ space suits were designed to protect them from harmful solar radiation and e__________(暴露) during their mission in deep space. （根据中英文提示拼写单词）

6 . The panda is a well-known e__________ (濒危的) species, with only a few thousand left in the wild. （根据中英文提示拼写单词）

8 . The d___________(离开）time of my flight is at 9 AM, so I need to arrive at the airport by 7 AM. （根据中英文提示拼写单词）

9 . An i________ (传染的) disease can be passed easily from one person to another, especially through the air they breathe. （根据中英文提示拼写单词）