__________ on their own efforts, they overcame all the difficulties and finished the task ahead of time.
All of the flowers now raised here have developed from those _______ in the forest.
Our company will move to a tall building _______ we worked two years ago.
Our company will move to a tall building _______ has just been complete.
Our company will move to a tall building _______ we bought last month.
She says that she’ll never forget the time ________ she works as a secretary in our company.