Jim ________ a late night film at home when，right in the middle of a thrilling scene，the  television went blank.                                         (2013·陕西，17)

A．watched

B．had watched

C．was watching

D．would be watching

按照机床在使用中的通用程度分类，CA6140属于（）。

A.专门化机床

B.通用机床

C.专用机床