◎ 题干
— They look worried. What's wrong with them?
— It seems that they            something important.
[     ]
A.have lost
B.lost
C.had lost
D.lose
◎ 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“— They look worried. What's wrong with them? — It seems that they something important. [ ]A.have lost B.lostC.had lost D.lose …”主要考查了你对  【现在完成时】  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。