1.The rise in electricity costs has__D__our difficulties in carrying out the project.
A.added up
B.added up to
C.added
D.added to-------增加了- - -
2.The computer was used in teaching.As a result,not only___B__,but students became more interested in the lessons.
A.saved was teachers' energy
B.was teachers' energy saved-------否定词not开头,句子要倒装
C.teachers' energy was saved
D.was saved teachers' energy