As nobody here knows what is wrong with the machine, we must send for an engineer to ______ the problem.
He was not an actor, who often appeared on stage, _____ a writer, writing stories.
He transplanted the little tree to the garden _____ it was the best time for it.
-----“What did he ask you?” -----“_____ I would be late.”
He had a lot of friends, but none of _____ could lend him any money.
_____ when one loses freedom does one know its value.