单选题   Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be done at normal speed, listen and try to understand the meaning. For the second and third readings, the passage will be read sentence by sentence, or phrase by phrase, with intervals of 15 seconds. The last reading will be done at normal speed again and during this time you should check your work. You will then be given 1 minute to check through your work once more.   
Calendar

    In the modem calendar, we label all years with B.C. or A.D.
 
【正确答案】
【答案解析】[听力原文] Calendar In the modem calendar, we label all years with B.C. or A.D. / There is no 'zero' year / —in this system, the year when Christ was born is 1 A.D., / and the year preceding it is 1 B.C. / This practice was first suggested in the sixth century A.D., / and was adopted by the pope of that time. / It took quite a while for it to become a worldwide standard, however. / Russia and Turkey, for example, did not convert to the modern calendar and year scheme until the 20th century.