It seems that a family just isn't complete (完整的) without a pet. But if pets aren't suitable to a family's lifestyle or environment, they can quickly lead to problems such as stress or arguments (争执). To save yourself and your family such problems, treat this decision seriously. When choosing a pet, people must consider the family's health. Many people are allergic (过敏的) to cats and dogs. Perhaps a dog or cat with short hair will be fine. And a dog might not be the best choice for a child who is naughty (顽皮的) because the dog might bite him or her. Some people can also have problems with certain pets. It's a good idea to spend a little time with the pet around each member of the family before making your decision. Consider the quality of life of the pet, too. If a pet is used to having space to run around, it can quickly develop psychological (心理的) problems when it is kept in a small flat all day. If pets are allowed to run about in areas with lots of traffic, they can meet an early end. Cats shouldn't be brought into homes that already have large dogs because they won't be able to get along well with each other.

    The decision as to what kind of pet to choose is very important. If you find the right one to suit (适合) everyone in the family and their lifestyle, then it's time to choose one. Remember that your decision is important because it can have effects that last for many years.

    Joy always rides her bike to school. It's four miles to school and it takes her about fifteen minutes. Joy likes riding to school. She says it's good for her health.

    Edward usually goes to school by bus. He likes talking with his friends on the bus. It's about ten minutes' journey (旅程) to school by bus.

    Mary's home is near the school. She usually walks to school. It's about five minutes' walk. Mary says she likes taking walks after meal.

    With air pollution making much difference to many of Chinese cities, parents are calling for the installation(安装) of air cleaners in classrooms. There has been much debate over whether air cleaners should be used in China's schools. Some parents have donated cleaners to their children's classrooms, while others raise money together to make the purchase(购买). “Our school bought air cleaners last year. We did a little fund raising, with each parent throwing in several hundred for that,” said one parent.

    However, the idea of installing air cleaners for all the classes has been refused by some schools. Liu Liangcheng, vice-principal of Beijing's Taipinglu Primary School, says installing air cleaners bought by parents may lead to problems. “We have refused air cleaners bought by parents before, as there are clear and strict rules against educational fees. We can't just break the rules here. And without standard guidance (指示) from local authorities(权威部门), it is hard to decide on the brand of the cleaner, installation and even safety of the device(设备).”

    Moreover, experts say air cleaners can cause other health problems. Deng Gaofeng who works for the China Academy of Building Research says. “ In the classroom, if we keep windows and doors closed, the concentrations (浓度) of CO₂ will double from 1,000 PPM to some 2,000 PPM. According to national safety standards, the highest level should not be more than 1,500.” In addition, experts say air cleaners on the market are mostly designed for homes or offices. Evaluation(评估) is needed to know whether they are suitable in classrooms.

    It seems whether air cleaners should enter China's schools is an ongoing question. It still requires a more detailed plan.

阅读以上信息，用恰当的单词完成下面的表格，每空一词。

Topic : Should air cleaners be installed for students in school?

    There are many libraries in Britain. Let's learn something about them.

Public libraries

    Most towns in Britain have a public library. A library usually has a large selection of books and other resources, which library members can use and borrow for free.

    Britain's First Public Library

    The first Britain's public library opened in Manchester in 1852. Its first librarian was a man called Edward Edwards. Edwards attended the library's opening ceremony and two famous writers called Charles Dickens and William Thackeray were there, too.

    Services of library

    Modern public libraries have something for everyone. Most of them have audio books, CDs, newspapers and DVDs as well as books to borrow.

    How to Join a Library

    To join a library, go to your local library and fill in a form. You'll receive a library card which is needed when using library services.

    Mobile Libraries

    Not everyone can get to a library. Some people live far away from towns and cities. Other people find it difficult to go out because they have an illness or a disability. Thanks to mobile libraries, these people can still borrow books.

    The libraries are special. Unlike most libraries, which store books in buildings, mobile libraries usually keep their books in a mini-bus. The back of the mini-bus has shelves for the books, and it is big enough for borrowers to step inside and look around. A driver take the mini-bus to a certain place at a certain time, so people know when to expect it. They can return their books and borrow some more.

    All Aboard the Library!

    A school in London didn't have space for a library inside the building. However, everybody agreed that it was still important to have a school library. So, the head of the school, Graham Blake, decided to park an old bus on the school car park and change it into a library. Pupils helped to paint the bus, and after eight months, the new library was ready.