单选题 After spending so many days lost in the desert, he was suffering from severe______.
【正确答案】 D
【答案解析】解析:句意:在沙漠中迷路了几天后,他严重脱水。hyperhydration“输液过量”;hypohydration“水分过少”;subhydration“次水解”;dehydration“脱水”。根据句意,本题答案为D。