Theirplanwasbuilton________and

发布时间:2020-07-28 04:44:26

Their plan was built on ________ and couldn't be tested by the practical life.A.sandB.sandsC.sandyD.sanding

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A解析句意:他们的计划不切实际,经不起实际生活的检验。built on sand固定结构“不稳固的”。
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