29. — When is he willing to lend his friends some money?— Only when ______ hard enough.
All of us have already known ____ she will choose is the opportunity to go abroad.
— Did you have a wonderful time at the ball last night?— ____ ! I’ve never had a more wonderful time all my life.
This machine is very easy______. Anybody can learn to use it in a few minutes.
Don’t blame the worker. He just carried out the order______.
I can’t remember when ______ turning point occurred exactly, but it might be ______ summer morning when I was in New York.