Strange things happen to time when you travel because the earth is divided into twenty-four zones,one hour apart.You can have days with more or fewer than twenty-four hours,and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean,your ship enters a different time zone every day.As you enter each zone,the time changes one hour.Traveling west,you set your clock back,traveling east,you set it ahead.Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific Ocean,you cross the International Date Line(国际日期变更线).By agreement,this is the point where a new day begins.When you cross the line,you change your calendar one full day,backward or forward.Traveling east today becomes yesterday.Traveling west,it is tomorrow.
( )1.Strange things happen to time when you travel because ______.
A.no day really has twenty-four hours
B.no one knows where time zones begin
C.the earth is divided into twenty-four time zones
D.in some places one day always has twenty-five hours
( )2.The difference in time between zones is ______.
A.one hour B.more than seven days
C.seven days D.twenty-four hours
( )3.If you travel across the Atlantic Ocean,going east,you set your clock ______.
A.one hour ahead in each time zone B.one hour ahead for the whole trip
C.one full day back for each time zone D.one hour back in each time zone
( )4.From this passage,it seems true that the Atlantic ______.
A.is in one time zones B.is divided into twenty-four zones
C.is divided into five time zones D.is in four time zones
( )5.The International Date Line is the name for ______.
A.the beginning of any new time zone
B.any point where time changes by one hour
C.the point where a new day begins
D.the end of any new time zone
1C 2A 3A 4C 5C
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