— Mum, today is Friday. Must I finish my homework now?      

— No, you _____. You may have a rest first and finish it tomorrow. [ ]

A. mustn't

B. can't

C. may not

D. needn't

蛛网膜下腔出血（）

A．意识障碍伴发热

B．意识障碍伴呼吸缓慢

C．意识障碍伴心动过缓

D．意识障碍伴高血压

E．意识障碍伴两眼向一侧凝视