acupofcoffee

　　ajarofjam

　　apieceofnews

　　atubeoftoothpate

　　apiece/sheetofpaper

　　apiece/sliceofbread

　　apiece/bitofadvice

　　abottle/glassofwater

　　apackofwolves

　　apairofshoes

　　aflockofbirds/chickens

　　agroupofpeople

　　acircleoffriends

　　aswarmofants

　　acollectionofcoins

　　acrewofsailors

　　afieetofships

　　aschoolofwhales

　　agangofhooligans

　　astringofpearls

　　aherdofcattle/elephants