Tom, clean up the broken glass _________ someone walks on it.
Please turn down the music, _________our neighbors next door will be disturbed.
In summer, food will go bad if_________in room temperature.
.QQ, _________you can chat with your friends, makes communication easy.
_________fit, we ought to learn more about our body and be careful with what we eat.
Of all the girls, Jane spent_________time and made_________mistakes.