◎ 题干
---Alice, you look puzzled, Have you understood it?
---Yes.I _____another problem just now.
A.l have thought of B.am thinking of
C.had thought of D.was thinking of
◎ 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“---Alice, you look puzzled, Have you understood it?---Yes.I _____another problem just now.A.l have thought of B.am thinking ofC.had thought of D.was thinking of…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  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。