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    The koala, one of Australia’s most treasured creatures, is in trouble.

    Affected by habitat (栖居地) loss and climate change, like many other uniquely Australian animals, koalas are being squeezed into smaller regions. But at present, it is a deadly disease, a somewhat silent killer that causes a further decline in the koala population, that is worrying many scientists about the fate of the koala.
    The killer is Chlamydia, which has caused symptoms in up to 50 percent of the wild koalas, with probably even more infected (感染) but not showing symptoms. It has been particularly severe in Queensland, where nearly all koalas are infected. The disease causes many symptoms including eye infections, which can lead to blindness, making it difficult for them to find their primary food.
    Treating Chlamydia in wild koalas is a challenge. There is no treatment available for it. Only a small percentage of the animals can be treated successfully and returned to the wild. Besides, there is no national plan in Australia to save the koala; it is up to each region to make management plans for its koala population.
    The good news is that researchers are working to test a vaccine (疫苗) that would help prevent further spread. If all goes well, plans can be carried out to distribute the vaccine more widely. But it’s impossible to vaccinate (给注射疫苗)  all wild koalas.
    Another possibility would be to make vaccine distribution a routine part of treatment for the thousands of koalas brought into care centers every year after they are injured by cars or dogs.
    While it is a combination of problems that are affecting the wild koala population, many experts believe this vaccine would be an important step in helping koalas survive longer. It may be enough time to give researchers a chance to solve some of the other problems facing Austalia’s koalas.
    小题1:Which isn’t considered the main cause of koala’s population decline?
    A．A deadly disease.
    B．Injuries from cars and dogs.
    C．Climate change.
    D．Habitat loss.
    小题2:The third paragraph mainly tells us         .
    A．the serious result Chlamydia has caused to the koala
    B．Chlamydia affected the koala only in particular regions
    C．the most serious symptom of Chlamydia is eye infections
    D．Chlamydia can seriously affect koala’s primary food
    小题3:We can learn from the text that the vaccine      .
    A．would cure the killer Chlamydia quite effectively
    B．would only be distributed in koala care centers
    C．has already been put into practical use in Australia
    D．cannot be distributed to all the infected koalas
    小题4:It can be inferred from the text that        .
    A．a national plan for saving koalas will be made soon in Australia
    B．koala population is declining only in a few regions
    C．researchers need enough time to solve the koala problems
    D．experts have lost the best chance to save the infected koalas

    小题1:B
    小题2:A
    小题3:D
    小题4:C
    文章讲述的正是考拉所面临的严重问题，栖息地和气候变化，尤其是一种特殊的疾病对考拉的影响。
    小题1:B 细节题。根据第二段Affected by habitat (栖居地) loss and climate change,以及第三段The killer is Chlamydia可知ACD是主要原因，而B则不是。
    小题2:A 段落大意题。这一段讲述的正是这种病对于考拉的允许及其结果。
    小题3:D 细节题。根据倒数第三段最后一句But it’s impossible to vaccinate (给注射疫苗)  all wild koalas.可知D正确。
    小题4:C 推理题。根据文章最后一句It may be enough time to give researchers a chance to solve some of the other problems facing Austalia’s koalas.可知C正确。
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