D. Food choices are just like one's selection of clothing，movies，and spouses.

　　解析：选B。主旨大意题。概括全文内容特别是文章第二段可知，本文主要介绍一个人的零食偏好往往能够反映出他未来的择业倾向。A项是文章的细节，不是本文的中心和主旨。

　　6. The underlined sentence in the second paragraph implies that ________.

　　A. a snack lover is more likely to find his dream job

　　B. it is becoming much easier to find your dream job than before

　　C. job hunting nowadays is as easy as finding your favorite snack

　　D. we can tell one's occupational choice by his favorite snack

　　解析：选D。推理判断题。应该把这句话跟下文联系起来理解，这句话还是说明根据一个人的零食偏好就能判断他未来会选择什么样的职业。

　　7. A person who likes cheese curls is most likely to be a ________.

　　A. police officer B. judge

　　C. producer D. truck driver

　　解析：选C。细节理解题。从第四段最后可知，喜欢奶酪卷的人适合的职业之一是制片人。

　　8. The favorite snack of a CEO is probably ________.

　　A. potato chips B. popcorn

　　C. cheese curls D. nuts

　　解析：选A。细节理解题。从第三段可知，CEO喜欢的食物是potato chips。

　　Ⅲ. 任务型读写

　　(2009年安徽一模)Like dogs，birds breathe in air and get oxygen to supply body tissues，while fish breathing depends on getting oxygen from water through parts of its body.

　　However，bird respiration(呼吸)is different from dogs and is much more efficient than that of other animals. The lungs take up just 2 percent of a bird's body volume，yet the bird quickly takes in large amounts of oxygen and quickly removes waste and excess heat.

　　There are actually two respiration systems，internal and external.

　　The external respiration system uses the lungs and a series of air sacs(袋囊)distributed throughout the body so that the oxygen supply is in direct communication with body parts. Oxygen is taken in and exchanged for carbon dioxide waste in the blood；then the carbon dioxide is moved out. So far，much like dogs.

　　However，in an important difference，the air flow in a bird is one way，through a series of tubes and cells，rather than two ways，in and out of the lungs，as it is in dogs. A constant stream of air goes through lungs and then is channeled through the complex system of air sacs，which also help remove excess heat，as well as through hollow bones. The gases are then channeled forward through the lungs again，then through more air sacs，finally ending up in the windpipe，and are expelled from the body.

　　The air sac system is bigger than the lungs and takes up 15 percent of the chest and belly area.

　　Meanwhile，the bird's great oxygen needs are also handled by the internal breathing system. The oxygen，stored primarily in body fat tissue，is burned through the process of cell respiration. This process produces both muscular energy and heat.

How does a bird breathe？ Ways to get oxygen For birds and dogs，by breathing in air For fish，from 1. ________through its body Two 2. ______systems Internal and external