Which is not true about the free online courses? 2
A. Students can watch short videos.
B. Students may ask the teachers some questions.
C. Students must take graded quizzes.
出自：国家开放大学 人文英语3
提示：
每天可免费获取10次答案
收藏本站【zk.995w.com】，下次访问不迷路
本站试题总数:【10253414】个 (题库试题定时更新)
