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英语 初中 · 九年级 北师大版 · 九年级上册 单选题 ★★☆☆☆ 编号 #9570
Lucy ___ about the problem yesterday.
A. was thinking
B. thought
C. is thinking
D. had thought
章节：动词的时态 · 知识点：一般过去时 · 标签：时态,一般过去时,语法
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