She opened her eyes with a start and was about to cry out ________ she heard her father urgently telling her to keep quiet.  

A．while

B．before

C．when

D．as

在下列哪种情况下，可以排除骨折的可能性（）。

A.无畸形

B.无骨擦音

C.无异常活动

D.畸形、骨擦音、异常活动均无

E.以上均不是