The teachers hold 4 to answer questions that the students have posted.

A. virtual office hours

B. face-to-face meetings

C. regular seminars
出自:国家开放大学 人文英语3

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
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