题目内容
Your watch always tells you what time it is now, but strange things happen 1 time when you travel, 2 it is divided 3 twenty-four time 4 , one hour 5 .
You can have days with more or 6 than twenty-four hours, and weeks with more or less than 7 days.
If you 8 a five-day trip 9 the Atlantic Ocean, your ship enters a different time zone every day. As you enter each zone, the time changes 10 . Travelling 11 , you set your watch back; travelling east, you set it 12 . Each day of your trip has 13 twenty-five or twenty-three hours. If you travel 14 ship across the Pacific, you cross the international dateline. 15 agreement, this is 16 a new day begins. When you 17 the line, you change your calendar one full day, 18 or forward. Travelling 19 , today becomes yesterday; travelling west, it is 20 .
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