.His conclusion, ______ on careful research, was acceptable.

Public attention at the moment is ______ on the problem of how to create

opportunities for the laid-off workers.

.He suddenly saw what looked like a snake in the darkness. For an instant his heart seemed to stop ______.

.She will tell us why she feels so strongly that each of us has a role ______ in making the earth a better place to live.

.Wait till you are more ______. It's better to be sure than sorry.

.Not ______ beautiful, the building is ______ now.

The decision was made ______ soon after the meeting was over. Who was made_____ the decision soon after the meeting was over?

Would you mind my ______ her to the party?

Would you mind not ______ to the party?

.Nancy isn't here. It's my fault, I forgot all about ______ her.

______ over and over again, but he still couldn't understand.