题目

Some days before Mother’s Day, the teacher wanted to know how his students were going to show their love to their mothers. Some of the students came from far away to study here. “Are you going home to see your mother during the holiday?”the teacher asked one of them.    The student answered, “I have no time to go home because I’m going to get ready for the exam. But I’ll write a letter to my mother.”   “Then which do you think is more important (更重要), your mother or the exam?”   “Of course the exam is more important,”answered the student.“My mother is下列数据中，是近似数的是A.足球比赛开始时每方有11名球员B.我国有31个省、直辖市、自治区C.光明学校有856人D.光的速度为3×108米/秒