—Come on, please give me some ideas about the project.—Sorry. With so much work _______ my mind, I almost break down.

 The situation seems to be better, and I suppose it is because of the war ______ to an end.

The cheater managed to cheat Lisa by ______ her into thinking he was rich at first. 

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.

As we know, penicillin became the greatest drug of the 20th century, ______ millions of lives.