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B) 根据对话内容,写出句中所缺单词。
8. —I heard you saw the ORB1S plane?
—Yes. They invited us on to visit this flying hospital.
8. board
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B) 根据对话内容,写出句中所缺单词。
8. —I heard you saw the ORB1S plane?
—Yes. They invited us on to visit this flying hospital.
8. board