Ⅰ．某研究性学习小组设计了一组实验来探究元素周期律．

甲同学根据元素非金属性与对应最高价含氧酸之间的关系，设计了如图1装置完成同主族元素C、Si非金属性强弱比较的实验研究；

乙同学设计了如图2装置实验来验证卤族元素性质的递变规律（夹持装置已略去）．A、B、C三个胶头滴管分别是氯酸钾溶液、NaBr溶液、淀粉KI溶液．已知常温下浓盐酸与氯酸钾溶液能反应生成氯气．

    Have you ever been sad because of failure? Please remember, for quite often achieving what you set out to do is not the most important thing.

    A boy decided to dig a deep hole behind his house. As he was working, a couple of older boys stopped by to watch. “What are you doing?” asked one of the visitors. “I want to dig a hole all the way through the earth!” the boy answered excitedly. The older boys began to laugh, telling him that digging a hole all the way through the earth was impossible. After a while, the boy picked up a jar. He showed it to the visitors. It was full of all kinds of stones and insects. Then he said calmly and confidently, “Maybe I can't finish digging all the way through the earth, but look at what I've found during this period!”

    The boy's goal was far too difficult, but it did cause him to go on. And that is what a goal is for－to cause us to move in the direction we have chosen, in other words, to cause us to keep working!

    Not every goal will be fully achieved. Not every job will end up with a success. Not every dream will come true. But when you fall short of your aim, maybe you can say, “Yes, but look at what I've found along the way! There are so many wonderful things having come into my life because I tried to do something!” It is in the digging that life is lived. It is the unexpected joy on the journey that really makes sense.

下列各句中，没有语病的一句是(　　)

    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）。