骨肉瘤好发于（）

A．短骨

B．长骨骨骺

C．长骨干骺端

D．长骨骨干

E．扁骨

- Shall we hand in the report tomorrow?

- _______. I don't think our teacher will be happy with it.

A．Never mind

B．Sure, go ahead

C．We'd rather not

D．Yes, better not