Some pre-school children go to a day care center,____ they learn simple games and songs.
English is a language shared by several diverse cultures, each of __________ uses it somewhat differently.
Many young people in the West are expected to leave __________ could be life's most important decision—marriage—almost entirely up to luck.
My chest __________ when I make a deep breath, doctor.
The plane, __________ by another plane, broke into pieces.
It worries me the way he keeps __________ his mind.