The number of teachers in our college __________greatly increased last term.A number of teachers in this school __________from the countryside.
____ is up to us to give them all the help _____ we can.
She is shy. She is not used to_____ in front of others.
I have great faith _____ you----I know you will do well.
I prefer playing outdoors ____ television.
He will _____ the company if his father dies.