－Are you coming to the English evening?

－I’m not sure. I     go to the concert instead.

A．must

B．might

C．should

D．would

变速器漏油可能是（）所导致。

A.变速器缺油或油质变坏

B.润滑油加注过多

C.变速器中间轴轴向间隙过大

D.同步器磨损或损坏