The lack of manners and common politeness is not （） to business deals. It’s a social blank.

A. Employment became widespread in the 17th and 18th centuries.
B. Unemployment will remain a major problem for industrialized nations.
C. The industrial age may now be coming to an end.
D. Some efforts and resources should be devoted to helping more people cope with the problem of unemployment.

A. very old people enjoy living with their relatives
B. very old people are able to keep their rooms clean
C. social services could have nothing to do with very old people
D. very old people prefer to live alone so that they can have more personal freedom