Therewerefiftypeople________whenth

发布时间：2020-07-26 02:00:05

There were fifty people ________ when the accident happened．A.on the boardB.on boardC.boardD.above board

网友回答

B解析on board为固定短语，意为“上车、船、飞机；在车、船、飞机上”。
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