單項選擇。It'sbadtothrowaboutpapereverywhere.Wemustavoid 國語站 題庫 3.14W 大中小設置文字大小 問題詳情：單項選擇。It's bad to throw about paper everywhere. We must avoid ________ that.A. do B. doing C. did D. to do【回答】B知識點：動詞和動詞短語題型：選擇題 TAG標籤：單項 #
