---________usefulworktheyhavedone!---Yes．Theworkwillhelpusmakebetteruse

发布时间：2020-08-06 19:55:48

---________ useful work they have done!---Yes．The work will help us make better use of water．A.WhatB.What aC.HowD.How a

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A解析what后跟名词词组useful work
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