◎ 题干
Harrison Ford is thought to be one of the few movie stars ____ as a carpenter before.
A.to work B.to be working
C.to have worked D.to have been working
◎ 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“Harrison Ford is thought to be one of the few movie stars ____ as a carpenter before.A.to work B.to be workingC.to have worked D.to have been working…”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。