【C】Long, long ago, the year started with the month of March and ended in February. Each odd month had 31 days, and the other months had only 30 days. February, the last month of the year, had only 29 days. The Emperor Augustus’ birthday was in August, not an odd month. But he wanted his month to have 31 days, too. So he ordered 31 days each for March, May, July, August, October, December, and January. And he cut the number of days in February. odd 奇數　emperor 皇帝　
【題組】51. How many days were there in February before EmperorAugustus’ order?
(A) 31 days .
(B) 30 days.
(C) 29 days.
(D) 28days.