—Atpresent,oneofthebestwaystostudyisworkingingroups. ...

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—At present, one of the best ways to study is working in groups.

—More chances _______ to students to learn from each other.

A. offer B. are offered C. have offered D. are offering

【解析】考查被動語態的用法。句子大意為“小組學習為學生提供了更多相互學習的機會”。“機會”和“提供”之間存在“被動”關係，須用被動語態。四個選項中，只有are offered為被動語態。所以選擇*B。