Only when _________ the tea-house _______ it was the same place he’d been in last year. [ ]

A. did he reach; he realized      

B. he reached; he realized

C. he reached; did he realize    

D. did he reach; did he realize

纤维性骨皮质缺损的特点包括（）

A.多见于6～15岁儿童，男多于女

B.有家庭发病倾向

C.病变常多发、对称性

D.呈囊状或片状皮质缺损区，有硬化边

E.多于2～4年内自行消失