单选题 I decided to ______ between Ralph and his brother, who were arguing endlessly.
A. interfere B. intervene C. interrupt D. interact

【正确答案】 B

【答案解析】[解析] 句子的大意为：Ralph和他兄弟吵得没完没了，我决定去调停他们。A项interfere“干涉，妨碍，打扰”；B项intervene“调停，干涉，插入”；C项interrupt“中断，打断，插嘴，妨碍”；D项interact“互相影响，互相作用”。所以B项符合题意。