◎ 题干
When he was a boy, he used to go there and watched _______.   
A.repairing bicycles
B.to repair bicyclesC.bicycles being repairedD.bicycles to be repaired
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“When he was a boy, he used to go there and watched _______. A.repairing bicyclesB.to repair bicyclesC.bicycles being repairedD.bicycles to be repaired…”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。