—It's time to go to bed, Li Ping.

—Mum, I have a lot of homework to do, I won't go to bed ________ I finish it. [ ]

A. until

B. since

C. as soon as

D. after

有关慢性硬脑膜下血肿的临床表现，下列不正确的是（）。

A.主要表现为慢性颅内压增高、神经功能障碍及精神症状

B.老年人以痴呆、精神异常和锥体束征阳性为多

C.小儿有嗜睡、囟门凸出、抽搐的特点

D.偶有癫痫发作

E.都有头部外伤史