单选题 Helen Keller"s work gave comfort and encouragement to other handicapped people who ______ might have led a hopeless life.
【正确答案】 D
【答案解析】[解析] 逻辑关系。根据句中comfort and encouragement与a hopeless life构成转折关系，选项中只有otherwise(否则，不然)可以表达转折的意思。故答案为D。