题目

       After 21 years of marriage, I started to go out with another woman. It was really my wife’s idea. “I know that you love her,” she said one day, taking me by surprise. “But I love YOU,” I protected. “I know, but you also love her.”        The other woman that my wife wanted me to visit was my mother, who has been a widow for 19 years, but the demands of my work and my three children had made it possible to visit her only occasionally. That night I called to invite her to go out for dinner and a movie. “What’s wrong, are you well?” she asked.        M某办公室需要粉刷的面积为90，如果每平方米在第一遍粉刷时用涂料是0.5升，第二遍粉刷时所用涂料是第一遍的，粉刷两遍如何购买涂料最省钱？（现售涂料为：大桶10升／桶，单价90元，小桶6升／桶，单价60元） [　　] A．8个大桶 B．7个大桶，1个小桶 C．4个大桶，6个小桶 D．1个大桶11个小桶