–Could you tell me ______ yesterday?

--I’m sorry, boss, My car was broken on my way here.

A．why you came late

B．why did you come late

C．why you come late

D．why do you come late

缺血性骨坏死最易发生在下列哪种骨折（）

A.月骨骨折

B.手舟骨骨折

C.大多角骨骨折

D.头状骨骨折

E.尺骨茎突骨折