◎ 题干
Zhangqiang is said ______ the experiment in the lab, but I can’t find him there.
A.to have doneB.to doC.to be doingD.doing
◎ 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“Zhangqiang is said ______ the experiment in the lab, but I can’t find him there. A.to have doneB.to doC.to be doingD.doing…”主要考查了你对  【therebe句型】  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。