Although ________ the 2012 Nobel Prize in Literature, Chinese writer Mo Yan does not consider himself to be a “literary master”. 

A．being awarded

B．awarded

C．having awarded

D．Awarding

试压泵稳不住压可能是针阀、放气阀、水阀泄漏，应（）。

A.研磨或更换

B.更换

C.研磨

D.维修