按要求改写下列句子。

1. My favourites subject is science. ( 就画线部分提问)

    _____ _____ your favourite subject?

2. They go home twice a year. ( 就画线部分提问)

    _____ _____ do they go home?

3. Peter does his homework every day. ( 改为否定句)

    Peter_____ _____ his homework every day.

4. Tom is waiting for a bus. ( 改为一般疑问句)

    _____ Tom _____ for a bus?

5. Close the door, please. ( 改为否定句)

    _____ _____ the door, please.

下列哪一项不是自发性蛛网膜下腔出血的原因()

A．颅内动脉瘤

B．动静脉畸形

C．烟雾病

D．动脉硬化

E．抗纤溶治疗