She had to work deep into the night, ______she couldn't have spread the messages to all the relevant...
2022-12-03 21:02:50 41次 2013-2014学年四川省绵阳市高三11月第一次诊断性考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
She had to work deep into the night, ______she
couldn't have spread the messages to all the relevant people successfully.
A.
while B.
but C.
otherwise D. so
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