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英语 高中 · 高一 人教版 · 必修第三册 单选题 ★★★★☆ 编号 #10377
The students are busy ___ for the coming examination.
A. to prepare
B. prepare
C. preparing
D. prepared
章节：非谓语动词 · 知识点：非谓语动词 · 标签：非谓语动词,语法
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