Whyareyouhere?Youaresupposedto 国语站 题库 1.64W 大中小设置文字大小 问题详情：Why are you here? You are supposed to ________ the experiment in the lab.A. perform B. be performing C. have performed D. be performed 【回答】B知识点：非谓语动词题型：选择题 TAG标签：#
