不是I-MIBG治疗肾上腺素能肿瘤的适应证是（）。

A.不适合手术、化疗或放疗的患者

B.术后复发或广泛转移的患者

C.预期存活3个月以上的患者

D.广泛骨转移所致剧烈骨痛

E.高血压不能控制者

—How long have you been studying at this school? 

—I have been studying here_____. [ ]

A. since I was thirteen years old        

B. when I was thirteen      

C. at the age of thirteen              

D. after I was thirteen