Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.

A．he finally realized

B．he had realized

C．did he realize

D．had he realized

其最可能的诊断为

A．急性腰扭伤

B．腰3横突综合征

C．腰椎管狭窄症

D．腰椎间盘突出症

E．梨状肌综合征