单选题 She soon fell asleep being tired of walking all day long.
【正确答案】 C
【答案解析】[解析] 应改为from。be tired of doing something:厌烦做某事;be tired from doing something:因做某事而感到疲倦/疲劳。句子的意思是:“因走了一天感到劳累,她很快睡着了。”