84消毒液是一种有刺激性气味的高效液体消毒剂．主要成分为次氯酸钠（NaClO），广泛用于宾馆、旅游、医院、食品加工、家庭等的卫生消毒．请阅读信息并回答：

（1）次氯酸钠的制取原理是氯气与氢氧化钠反应生成氯化钠，次氯酸钠和水，化学反应方程式为　____ ；

（2）消毒液中次氯酸钠自身没有消毒作用，有消毒作用的是次氯酸钠与空气中二氧化碳反应得到的次氯酸（HClO），化学方程式为　____　；

（3）84消毒液是含氯消毒剂，氯气是一种挥发性的有毒气体，因此，84消毒液必须____保存．

2.5×(4＋0.4)=2.5×4＋2.5×0.4应用了____律．

    Here comes the last term of Junior 3. Terrible! The big exam is coming in less than two months. You still have a lot to do. How will you spend it? We invited three students to share their stories.
Dou Yi, 15,Beijing
    My chemistry  used to be poor in the past. I got scores of around 40 on every test. During the last term, I decide to beat chemistry. I will start to work hard. In class I take every possible note. After school, I spend most of my time studying chemistry. My parents also ask their friend, a chemistry teacher, to help me . Finally in the latest exam, I got 65! How happy I am!
Wang Zhaolin, 16, Chongqing
    My foot got hurt a week before the big PE exam . Luckily, I recovered（康复） in time. For PE , all you need is to practice. Sports can also help you relax. Be careful not to get hurt as I did.
Wang Feixuan, 15, Xi'an
    My experience is that for Junior3, every minute of the last term is important. Don't waste any of them. I try to remember English words while waiting in line to get my lunch. I read textbooks on the bus to and from school. I work hard at home and sometimes stay up late studying. Want to have fun? Leave it for the summer holiday after the big exam!

通读全文，根据短文理解，选择最佳答案填空。

    My father is forty years old. He works in a 1 . He is a waiter. He is very 2 every day. He goes to work very early and 3 home very late. Our home is a bit far(远的) from his workplace, so he usually 4  a bus to work. He has a lot of things 5 every day. There are many people in the restaurant every day, and there are more people 6 Saturdays and Sundays. People like to come to the restaurant 7  it has some specials for dumplings every day. The bowls have three 8 small, medium, and large. If you don't have enough money with you, you may 9  them next time. My father is 10 to everyone, so people like to talk with him.