题目

期中、期末两次成绩分别按40%、60%的比例计入学期学科总成绩。小明期中数学成绩是85分，期末数学成绩是90分，那么他的学期数学成绩为（）分。 A . 85 B . 87.5 C . 88 D . 90 答案：B______ I was doing my homework, my brother was watching cartoons.A. Because B. While C. As soon as D. After