________ is known to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
It was because of bad weather ____ the football match had to be put off.
All examinations are passed. This is the first time I ____ really relaxed.
She insisted that we ________ the source of the river and begin our journey there.
_____ he is determined to do something, no one is able to make him ______.
Rather than ______ on a crowded bus, he always prefers _______a bicycle.