---Youshouldfindwaystobringdownthecost．---Yes,I'lltrytodo________

发布时间：2020-08-07 04:25:04

--- You should find ways to bring down the cost．--- Yes,I'll try to do ________ is necessary for it．A.thatB.whateverC.whenD.everything

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B解析whatever引导宾语从句，whatever＝anything,that
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