HadIknownaboutthisco的精選

問題詳情：HadIknownaboutthiscomputerprogram,ahugeamountoftimeandenergy________. A.wouldhavebeensaved B.hadbeensaved   C.mustbesaved      D.wassaved【回答】A知識點：虛擬語氣與情態動詞題型：選擇題...