-IsTomswimminginthepool,Mary?--It 國語站 題庫 1.13W 大中小設置文字大小 問題詳情:-Is Tom swimming in the pool, Mary?--It ______ be him. I saw him in the supermarket just now. A. must B. may C. can’t D. need【回答】C知識點:情態動詞題型:選擇題 TAG標籤:#