He found it hard for Alan to focus on his teachers for longer than five minutes, _________ if the lecture was boring. 

In our life, one question that ____ comes up is:“to be or not to be?”

Though she did not know Boston well, she made her way_____to the Home Circle Building.

Kim Jong un , who attended the 2012 New Year’s concert on Sunday, thanked the performers and spoke      of their successful performance.

The hotel was nice; the weather was warm; the beaches were beautiful. ________ I’d say it was a great vacation.