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英语 高中 · 高三 译林版 · 必修第三册 单选题 ★★★★★ 编号 #10389
If there ___ no air, there would be no living things.
A. was
B. is
C. were
D. are
章节：虚拟语气 · 知识点：虚拟语气 · 标签：虚拟语气,语法
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