The police finally found out the ______ of the man who helped send the old man to hospital, but were asked to keep it secret.
He is __________ careless a student that he often __________ some letters while writing.
How did you get into __________?
His plan was such a good one __________ we all agreed to accept it.
It’s impossible for __________ few people to finish __________ a lot of work in only two days.
Simon made a big bamboo box __________ the little sick bird till it could fly.