When I was _______ the school football team because I was unfit, I knew it was time to quit _______.
Tom is very clever, but he doesn’t like working hard. _________ Will.
Hearing the news that he failed in the entrance exam a third time, he sobbed _________.
What would have happened ________, as far as the cliff?
The 2010 Expo will take place in Shanghai, ________ many countries consider a good chance to introduce their cultures to the world.
The professor’s research finally proved to be ______, though he had spent a lot of money on it.