His mood v from day to day, and he is hard to deal with.
Tom and John have been c__________ friends since their childhood.
When their money ran out, they persuaded some businessmen to help them f__________.
He can get a large a__________ of help when in trouble.
He told one or two amusing __________ (趣闻) about his years as a policeman.
They set out to __________ (积累) a huge mass of data for the research.