英语阅读题Everybody uses A.M.and P.M.to mean before noon and afte

英语阅读题
Everybody uses A.M.and P.M.to mean before noon and after noon.But do you know exactly what they mean and how they came into being?
We know that the turning of the earth makes the sun and stars seem to move across the sky.Daylight,of course,begins with the sun rising in the east and end with the sun setting in the west.Being high in the sky,between these two positions,the sun has traveled a quarter journey,and half of the daylight hours have been spent.
Therefore,by noticing where the sun stood in the sky,early man learned how to tell the time of the day.At night,the stars,were observed.He could also know the time.
The important thing in keeping time is to know the exact moment of noon.For each of us,wherever we are,noon is when the sun is directly overhead.Think of an imaginary line,a meridian(子午线)drawn across the sky,going from the north point of your horizon down to the south point.
When the sun crosses your meridian,it is noon for you.When the sun still lies to the east of your meridian,it is morning.After the sun has crossed this meridian ,it is afternoon.
The Latin word for "midday" is meridiem,from which comes our word ante meridiem,whose short form is A.M.,which means before midday.P.M.is the short form for post meridian,meaning after midday.
66.The English word "meridian" means ______.
A) P.M.in Latin
B) Post meridiem in Latin
C) ante meridiem in Latin
D) meridiem in Latin
67.Early man learned how to tell the time of the day ______.
A) by observing the positions the stars exist in the sky
B) by drawing a meridian across the sky
C) by noticing where the sun stood in the sky
D) by knowing the exact moment of noon
68.Which of the following is true according to the passage?
A) P.M.is the short form for post meridiem in Latin standing for "in English".
B) A.M.means before noon in English and ante meridiem in Latin.
C) Daylight begins with the sun rising in the west and ends with the sun setting in the east.
D) Meridiem in Latin comes from our word meridian.
69.It is the exact moment of noon _____.
A) that the sun crosses the imaginary line
B) when the sun still lies to the east of the meridian
C) when the sun is not directly overhead.
D) after the sun has crossed the imaginary line
70."Before midday" means ______.
A) half of the daylight hours have been spent.
B) the sun hasn't travelled a quarter journey yet
C) the sun has travelled half of its journey
D) the sun has travelled a quarter journey.

d c b a c