hungry, stressed, or in pain. ―All behavior depends on history, context and expectation, Tony Buffington, a cat expert, told Wired. ―So it's naive to think that cats can only purr for one reason-it's like thinking that people can only laugh for one reason.‖ Cats' purrs are open to interpretation.

　　Mother cats purr to lead their kittens-which are blind and deaf when they're born-to them for food and warmth. In turn, vets believe, kittens purr to show they're okay and help them bond with mama cat.

　　 Purrs release feel-good endorphins（脑内啡）, so experts think cats use the vibrations（颤动） to soothe themselves. That could mean purring while enjoying some cozy cuddles from their owner, or it might help calm their nerves-or literally heal their pain. Studies have found that whole-body vibrations of 35 to 50 Hz could help stimulate bone healing. Cats' purr frequencies range from 25 to 150 Hz, and some suggest the vibrations could help kitties keep their bones strong.

　　As for purr frequencies go even higher than150 Hz, those serve an entirely different purpose. One study found that when cats were trying to get their owners to feed them, their purr frequency shot up to 220 to 520 Hz-awfully close to the 300 to 600 Hz of a human infant's cry. Researchers suggest the higher frequency makes the sound harder for cat (and baby) parents to ignore.

8. What can you infer from the underlined sentence (first paragraph)?

A. You should wash your hands after you touch the cat.

B. You'd better pat the cat until it is satisfied.

C. You are probably not as lovable as you think.

D. You should pat the cat on the back.

9. What does the underlined word ―them‖ refer to?

A. Mother cats. B. Kittens.

C. Food and warmth. D. Cats' purrs.

10. What is the text mainly about?

A. It is proved that cats' purrs release feel-good endorphins.

B. Cats behavior research still has a long way to go.

C. Cats purr in the highest frequency to ask for food.

D. Cats purr to convey different messages.

第二节

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Before You Take a Test

　　It's important to prepare well for big tests - especially for exams like the TOEFL, IELTS（雅思） or Cambridge First Certificate (FCE). This guide will help you take steps towards doing your very best on the big day.

　　Know Your Test

　　____11____ Reading test-specific preparation materials will help you understand your strengths and weaknesses on specific topic areas covered in the test.

　　Understanding which types of problems are easiest and which are most difficult will help you develop a study plan for the test. While developing your plan, take note of grammar, vocabulary, listening, speaking and writing expectations. ____12____

　　Practice, Practice, Practice

　　Once you have established a study plan, you'll need to do lots of practice. ____13____

　　Practice Specific Types of Test Problems

So you've studied up on your grammar, writing, and vocabulary, now you'll need to apply these skills to specific types of exercises you will find on your exam.