She devoted herself __________ to her research and it earned her a good reputation in her field. 

--- It is what parents say and do that really matters in children’s character training. --- ___________.

Keys should never be hidden around the house since thieves _____ know where to look.

---Mary has been trained hard for the last two years. ---______ she did so well at the track and field meet yesterday.

It is good for elderly people to be _________ involved in community service.