单选题
Strange things happen to time when you travel, because the earth is divided into twenty four time zones, one hour apart. You can have days with more 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 of twenty - three hours.
If you travel by ship across the Pacific, you cross the international date line. 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!
单选题
The difference in time between zones is______.
【正确答案】
C
【答案解析】解析：细节题。由句首的那一句话Strange things happen to time when you travel，because the earth is divided into twenty four time zones，one hour apart．再联系地理方面的知识，可知时区与时区之间的时间差为一个小时。
单选题
From this selection, it seems true that the Atlantic Ocean______.
【正确答案】
C
【答案解析】解析：判断题。根据第二段段首一句If you make a five—day trip across the Atlantic ocean，your ship enters a different time zone every day．，“横渡大西洋做五天的旅行”，段落末尾又说“每一天你的旅行不是二十四小时，就是二十五小时”。由此可以判断大西洋跨五个时区。
单选题
If you cross the Atlantic Ocean going east, you set your clock______.
【正确答案】
A
【答案解析】解析：细节题。根据第二段的介绍，自西向东横渡大西洋时，因每增加一个时区，就早一个小时。即“…traveling east，you set it ahead．”，所以答案为A。
单选题
The International Date Line is the name for______.
【正确答案】
C
【答案解析】解析：根据最后一段第一二句“…this is the point where a new day begins．”可得答案。