【正确答案】：
WHEN A PATIENT SUFFERS FROM ILLNESS FOR A LONG TIME AND THERE IS NO HOPE OF CURING IT, WHY DO WE LET HIM PROLONG THE THROES? WHY CAN’T WE PRACTICE EUTHANASIA TO STOP THE THROES?
【题目解析】：考点：长期：for a long time；遭受：suffer from；痛苦，剧痛：throes。句子结构：时间状语从句+特殊疑问句，when引导的时间状语从句，由特殊疑问词why引导的特殊疑问句。