The project he was confident about ___________ to be a failure.

How much did you _________ for repairing the bicycle  ?

Scientists think they have _____ in their attempt to find the causes of some major dieases.

Science and technology is changing fast nowadays. I bought this MP3 player at the beginning of this year but now it's out of ________.

When he was driving home, he was stopped by the policeman and was _______ of speeding.