--- Why don’t you ride your bicycle today?

--- Oh, it broke down. It ________ now.

A．is repairing

B．is being repaired

C．is repaired

D．will repair

患者，男，23岁。头部被铁棍打击，昏迷约7分钟，清醒后不能回忆当时受伤情况，现头晕头痛，坐、立时加重。检查：神经系统无阳性体征，X线摄片颅骨正常。其诊断是（）。

A.颅内血肿

B.脑干损伤

C.脑挫裂伤

D.脑震荡

E.头颅软组织挫伤