________alanguagerequirestimeandeffort.A.Learn ... 國語站 題庫 1.76W 大中小設定文字大小 問題詳情:________a language requires time and effort.A.Learn B.LearningC.To learn D.Being learned【回答】B知識點:非謂語動詞題型:選擇題 TAG標籤:#