... otmeasuremsnt ('year', 'week', 'gram'~,'mile' etc) are always;'singularWhen usedih'9bmpoun lectives: ten-secorldsilence"'El~six-minute;;wait', ... officers and their familie§.',/Iocal go''''~.nnmI9ntofVGers', 'acustoms officer' ~ ~ ~office worker=a person who worlss in an 'Between five and six~the ... start toone's married life.The possessive form is one's (WI'TH 'si: 'It is difficult to estimate one'schances of success.' See alsoIT'S" . 9 X One...