Thismachineisveryeasy 国语站 题库 1.49W 大中小设置文字大小 问题详情: This machine is very easy ________. Anybody can learn to use it in a few minutes.A. operating B. to be operating C. operated D. to operate【回答】D知识点:非谓语动词题型:选择题 TAG标签:#