Swimming alone ____ be ____ dangerous. Do be careful.
They are good friends and share __________ with each other.
Do you remember there __________ a river here?
She died __________ old age while her son died young.
—What do you think of teaching, Bob? —I find it fun and challenging. It is a job __________ you are doing something serious but interesting.
He hurried home, only to find his house __________.