A person who has never tasted bitter won’t know ______ sweet is.
He looked at the envelope and _________ Jenny’s handwriting immediately.
_____ to his work, the scientist didn’t get married all his life.
Our leader insisted that the plan _________ reasonable and we _________ it out.
Mr Smith is a boss, _____ factory my uncle is working.
--So you missed the important meeting yesterday? --_________. I got there five minutes before it was finished.