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英语 小学 · 六年级 外研版 · 六年级下册 单选题 ★★☆☆☆ 编号 #9587
Our teacher ___ a new bridge right now.
A. was building
B. is building
C. builds
D. has built
章节：动词的时态 · 知识点：现在进行时 · 标签：时态,现在进行时,语法
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