By the time he realizes he _____ a mistake, it’ll be too late for him to change his mind.
3.Once one’s desire ______ reason, trouble is sure to follow.
_______ Saturday, rather than _______ at home, I preferred _______.
____ from the top of the tower, the Bird Nest looks like a big bird.
Is it in this hospital my father had worked at I was born?
_______ a mobile phone can you ring _______ you want to talk with anywhere .