题干
No sooner ____ they rushed out into the street.
A：did they hear the news tha
B：did they hear the news whe
C：had they heard the news tha
D：had they heard the news whe
答案(点此获取答案解析）
C
；③
；④垂直于同一条直线的两条直线必平行吗？⑤一个数不是合数就是质数；⑥把门关上．