By the time he arrives in Beijing, we ________ here for two days. ( 章节：1 难度：3)
- A、will have stayed
- B、have been staying
- C、shall stay
- D、have stayed
正确答案:A
答案解析:有
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By the time he arrives in Beijing, we ________ here for two days. ( 章节：1 难度：3)
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