The fire was so strong that the firefighters couldn’t get it under control, so some soldiers were _______ to help put out the fire.
Our neighbor offered to look after our baby while we were away, ____ was very kind of her.
I was walking in the street yesterday _____ I met with our football coach.
—Jessica is very bright and studies very hard _____. —No wonder she always gets the first place in the examination.
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
It is no use ____ with that mean storekeeper, for he won’t cut down the price.