Havingatripabroadiscertainlygoodfortheoldcouple，butitremains_______whe

发布时间：2020-08-06 05:00:31

Having a trip abroad iscertainly good for the old couple，but it remains _______ whetherthey will enjoy it．A.to seeB.to be seenC.seeingD.seen

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B解析remain to be seen意思是“有待观察”。
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