A.The confusion over food expiration labels.
B.The surplus resulting from overproduction.
C.Americans' habit of buying food in bulk.
D.A lack of regulation on food consumption.

单项选择题A.It has warmed its people against possible food shortages.B.It has penalized businesses that keep overproducing foods.C.It has started a nationwide campaign against food waste.D.It has banned supermarkets from dumping edible foods.

单项选择题A.Moveable metal type began to be used in printing.B.Chinese printing technology was first introduced.C.The earliest known book was published.D.Metal type was imported from Korea.

单项选择题A.It pushed handwritten books out of circulation.B.It boosted the circulation of popular works.C.It made writing a very profitable career.D.It provided readers with more choices.

单项选择题social workers should learn how to（）people.

A.look at
B.look into
C.look after

单项选择题A.It had more than a hundred printing presses.B.It was the biggest printer in the 16th century.C.It helped the German people become literate.D.It produced some 20 million volumes in total.

单项选择题A.It is as important as Christmas for African-Americans.B.It is a cultural festival founded for African-Americans.C.It is an ancient festival celebrated by African-Americans.D.It is a religious festival celebrated by African-Americans.

单项选择题A.It accelerated the extinction of the Latin language.B.It standardized the publication of grammar books.C.It turned translation into a welcome profession.D.It promoted the growth of national languages.

单项选择题A.The qualifications you have.B.The pay you are going to get.C.The culture of your target company.D.The work environment you will be in.

单项选择题A.They get bored after working for a period of time.B.They spend an average of one year finding a job.C.They become stuck in the same job for decades.D.They choose a job without thinking it through.

单项选择题A.See if there will be chances for promotion.B.Find out what job choices are available.C.Watch a film about ways of job hunting.D.Decide which job is most attractive to you.