Obama didn’t explain ______ any larger principles have guided him through the historic convulsions of the 2011 Arab Spring.
We should prevent such a silly mistake _____ again.
_____ full preparations, we decided to put off the meeting till next week.
I’m examining the article he has just finished _____ the possible mistakes in it.
How could he get the plan _____ without any one to support him?
The sun was shining brightly, _____ everything there _____ more beautiful.