◎ 题干
— What's the matter, John? You look sad.
— Oh, nothing much. As a matter of fact, I ___ of my friends back home.
 [    ]
A. just thought
B. have just thought
C. was just thinking
D. have just been thinking
◎ 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“— What's the matter, John? You look sad. — Oh, nothing much. As a matter of fact, I ___ of my friends back home. [ ]A. just thought B. have just thought C…”主要考查了你对  【过去进行时】  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。