In writing，students may not know how to put something into proper English and thus ask their teacher for help.Here the teacher is to play the role of a/an＿＿._做题室

单项选择题 In writing，students may not know how to put something into proper English and thus ask their teacher for help.Here the teacher is to play the role of a/an＿＿.: A、facilitator; B、assessor; C、controller; D、participant

正确答案：B
答案解析：
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