---HasWilliamfinishedwritinghisgraduationpaperyet?---Idon'tknowexactl

发布时间：2020-08-07 04:26:25

---Has William finished writing his graduation paper yet?---I don't know exactly, but he ________ all day.A.is writingB.has been writingC.was writingD.wrote

网友回答

B解析表示“一整天都在做某事”要用现在完成进行时．
以上问题属网友观点，不代表本站立场，仅供参考！