Themachineisveryeasy 国语站 题库 1.58W 大中小设置文字大小 问题详情：The machine is very easy ____________ne can learn to use it in a few minutes. A. operating B. to operate C. to be operated D. to be operating【回答】 B知识点：非谓语动词题型：选择题 TAG标签：Themachineisveryeasy #
