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

 It’ll do harm to you to lie in bed _____. 

The game was so exciting to play that the boy kept his eyes and attention ________ on it, ruining both a lot. 

________ warm at night, I would fill the woodstove, then set my alarm clock for midnight so I could refill it.

The banker was found in a remote village after ______ his office last Thursday.