搜题，就来5TiKU.com题库【问题】 They can join online groups 3 . A. to discuss the quizzes B. to exchange questions and answers C. to present their observations
They can join online groups 3 . A. to discuss the quizzes B. to exchange questions and answers C. to present their observations
正确答案：B. to exchange questions and answers
题目解析：本题出自贵州广播电视大学，国家开放大学 人文英语3，由丰阳塔题库搜集整理。
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