My grandfather is eighty years old. He sometimes complains（抱怨）about how fast things have changed.
He often says that families aren't the families they used to be. A lot of families have broken up（破裂）. If husband and wife have problems with their marriage, they will no longer stay together. And mothers used to stay at home to take care of their children, but now they’re busy working. They have no time to look after children at home. What’s more, more and more people drive. We used to walk five miles to school every day, even in winter. But now children don't. And in school, children don't have to think more as we used to. In math class, for example, we used to add, subtract, multiply and divide（加、减、乘、除）using our heads. But now most students use calculators. Most families have computers now. In the past, we didn't have computers. We even had no lights. My mother to spend all day cooking in the kitchen. But now few people eat home-cooked food. And people seldom talk to each other. They are too busy to talk, too busy to eat, too busy to think… Life used to be simple, but it isn;t any more.
根据短文内容，判断句子是否正确，正写（A），错写（B）。
