Some passengers were talking through one of the big halls at
Some passengers were talking through one of the big halls at the airport,___the whole roof feel down. A:while B;as soon as C:when D:still 我选的是C,不知是不是,亲,帮个忙!
对的,我们老师讲的 were/was doing sth.when ······ 正在做某事,突然····发生 还有 be about to do sth.when······ 刚要去做某事,突然······发生 had done sth.when ······ 刚做完某事,突然·······发生 她三个一起讲的,所以我就一起罗列出来了······