题目内容
On Saturdays, students are very proud to be on the street to guide passers-by to obey traffic rules.
| A．characters | B．volunteers | C．operators | D．graduates |
B
解析试题分析：A. characters人物，性格，B. volunteers 志愿者，C. operators接线员，操作员，D. graduates毕业生，句意：在星期六，学生很自豪能做街上的自愿者指导行人遵守交通规则。根据句意选B.
考点：考查名词辨析
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