Read the following passage and mark the letter

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct
answer to each of the questions.
Strange things happen to time when you travel, because the earth is divided into twenty-four time zones
(mui gio), 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 cast, 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. 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 west, today becomes yesterday; traveling east, it is tomorrow.
36. How many time-zones is the Earth divided into?
A. seven
D. twenty
B. twenty-four
C. one hour
37. According to the passage, what do we do when we travel west?
A. We set our clock back.
B. We set our clock ahead.
D. We pass each day.
C. We set our clock forward.
38. The word "across" in the second paragraph means
A. passing
B. going
39. The international-date-line is the name for
A. the beginning of any new time zone
C. the point where a new day begins
D. backwarding
B. any time zone in the Pacific Ocean.
D. any point where time changes by one hour
C. forwarding
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