You should have ________ to your roommate, John. What you said yesterday hurt him deeply.
---I'm sorry I stepped outside for a smoke. I was very tired. ---There is no ______ for this while you are on duty.
.It ______ to me that I should pay a visit to my friend Jane next week.
Public attention at the moment is ______ on the problem of how to create opportunities for the laid-off workers.
.His conclusion, ______ on careful research, was acceptable.
.Our neighbor has ______ ours.