I regret _________ you that you can't ________ the game.
. Allow children the space to voice their opinions, _______ they are different from your own.
My brother, ________ is in the army now, used to be an artist.
________ matters most in learning English is enough practice.
When he woke up, he found ________lying by the sea.
The chairman thought ________ necessary to invite Professor Smith to speak at the meeting.