单项选择题
（）the bedroom than his father returned.
A.No sooner he had leftB.No sooner had he leftC.Hardly he had leftD.Hardly had he left
单项选择题 Technical analysis focuses on （）.
单项选择题 They overcame all the difficulties and fulfilled the plan two months ahead of time，which was something we（）.
单项选择题 To avoid traffic accidents，every driver must follow traffic rules.（）
