They did everything in their power to save the building dating back to the Qing Dynasty, but their efforts were _______.
We will be shown around the city: schools, museums, and some other places, _______ other visitors seldom go.
The old building, behind _______ was a famous church, was _______ we used to work.
The little time we have together we’ll try _____ wisely.
We are living in an age ______ many things are done on computer.
It’s said that he’s looking for a new job, one ______ he can get more money to support his family.