Viết thành các tính từ ghép
1.A summer vacation lasts three months => A three-month summer vacation
2.A tour lasts six days => A six-day tour
3.A rest lats ten minutes => A ten-minute rest
4.A report longs three pages => A three-page report
5.A stamp costs five hundred dong => A five-hundred-dong stamp
6.A class lasts two periods => A two-period class