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Allpassengersareexpectedtofastentheseatbeltswhentheplanetakesoffandlands.A.onaboardB.onboardC.ontheboardD.onboards

题目详情

All passengers ______ are expected to fasten the seat belts when the plane takes off and lands.
A.on aboard B.on board C.on the board D.on boards
▼优质解答
答案和解析
B

考查短语搭配。句中on board为“在飞机上”之意。句意:当飞机起飞和降落的时候,所有的乘客都要求系上安全带。