All passengers _______, please fasten your seat belts and remain seated _______
题型：不详难度：来源：
All passengers _______, please fasten your seat belts and remain seated _______ the plane is landing.| A．on board; until | B．abroad; since | C．on the board; before | D．aboard; when |
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答案
| D |
解析
试题分析：句意：所有机上的乘客，请系好安全带，当飞机着陆额时候仍然要坐着。on board 在此处相当于aboard，表示"在飞机上"。第二个空填when，指当飞机着陆的时候。选D。 |
举一反三
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