_______ I came into the office, the teachers were having a meeti
分类: 英语（专升本）(z0009)发布时间: 2024-09-16 17:56浏览量: 0
_______ I came into the office, the teachers were having a meeting. A、While B、When C、Once D、Since 【正确答案】：B 【题目解析】： while引导的从句中动词常常是表示延续的动词或表示状态的连系词be; when表示“当……的时候”；once表示条件；since表示时间时意思是“自从……”。根据句意可知选B项。