The rise in electricity costs has our difficulties in carrying out the project.
A. added up
B. added up to
C. added
D. added to
网友回答
A. added up
B. added up to
C. added
(答案→)D. added to
解析：考查短语辨析。句意“电价的上升已经增加了计划实施的困难。”added up“累计”；added up to“总共；意味着”；added to“增加”。故选D。