国开《人文英语4》单元自测4（10分） 形考试题 【题目】 I was giving a talk to a large group of people，the same talk I ___to half a dozen other groups before. was giving am giving had given 试题来源人文英语4 查看整套课程试卷 此内容查看价格为0.2金币，请先登录如有问题，请联系微信客服解决！
