Some experts believe it is the grandparents who ________ for the spoiled child.

A．are to blame

B．are to be blamed

C．should blame

D．are blamed

一青年左小腿上端肿痛，先是间歇痛，后加剧呈连续性，夜间重，患部肿胀发热，静脉曲张，可能是（）

A.恶性骨肿瘤

B.骨结核

C.急性骨髓炎

D.蜂窝织炎

E.胫骨结节骨软骨炎