单词拼写：根据首字母或汉语提示写出相应单词的正确形式。（共10题，每题1分满分10分）
Some experts say high fever maybe a s_______of A H1N1.
For_________(显而易见的)reasons we had to cancel tonight’s performance.
He e_________ from prison this morning.
The hurricane_________(袭击)  the southeast of England in October,2009.
The medicine had no _______(影响) on the patient.