Name The Year: Kosygin and Brezhnev replace Soviet premier Nikita Krushchev.?

Questions

A familiar kitchen-garden vegetable about as large and wise as a man's head?

A person who boasts himself hard to please because nobody tries to please him?

A person whom we know well enough to borrow from,but not well enough to lend to?

A woman with a fine prospect of happiness behind her?

To perform successively and successfuly mastication,humectation & deglutition?