题目

下列不属于生命现象的是                                 （    ） A.母鸡下蛋        B.铁皮生锈        C.雨后春笋        D.葵花向阳 答案：B根据句意及所给汉语，写出空缺处单词的正确形式 Uncle Wang helped Xiao Liu ________ (修理) his bike yesterday.