The fans were very excited that the stars they had been looked forward to ________at last.

A． came

B．coming

C．come

D．has come

下列关于骨膜的描述正确的是（）

A.包裹在整个骨的外面

B.外层有产生新骨的功能

C.富有血管、神经但无淋巴管

D.对骨损伤的修复无作用

E.是由纤维结缔组织构成的膜