Afer decades of effort, the city is still trying to_______ how to ban smoking in public places.
With a lot of difficult problems ____, the newly -elected president is having a hard time.
---May I have a word with you? ---______. I'm not busy, anyway.
The experts suggested the problem worth paying attention _____ at the meeting.
I wrote him a letter to show my _____ of his thoughtfulness.
_____ got on the train when it began to move.