Many students from the new library since it was open to all.
A. benefited
B. were benefited
C. have been benefited
D. have benefited
网友回答
A. benefited
B. were benefited
C. have been benefited
(答案→)D. have benefited
解析：句意：自从图书馆开馆以来许多学生从新的图书馆受益。benefit from因......而得益；因为since自从，它常与现在完成时连用，故排除AB；又因为主语many students与benefit之间是主动关系，故排除C，所以应选D。