国开《 综合英语（3）》Unit8 单元练习 形考试题 【题目】The researchers have conducted an experiment to prove that people will act in emergencies when _______. they are in pairs they are in groups they are alone they are with their friends 试题来源 综合英语（3） 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！
