tknowshewashisgrandm的精選

問題詳情：________hergrandmabefore,hedidn’tknowshewashisgrandmaevenifhismotherhadtoldhim.（  ）A．NotbeingseenB．NothavingseenC．HavingnotseenD．Notseeing【回答】B知識點：動詞時態與語態題型：選擇題...