Strange things happen to time when you travel, because the earth is (11) in

Strange things happen to time when you travel, because the earth is 11. divided into twenty-four time zones (时区), one hour separate. You can have days with more or 12. fewer than twenty-four hours, and weeks with more or fewer than seven days. If you make a 13. five-day trip across the Atlantic Ocean, your ship enters a different time zone every day.  As you enter each zone, the time 14.changes one hour. Traveling west, you set your clock back; traveling east, you set it ahead. Each day of your trip has 15. either twenty-five or twenty-three hours.