有關英語六級閱讀備考技巧

　　11. A new study on birds sleep has revealed that ____________.

　　A) half-brain sleep is found in a wide variety of birds

　　B) half-brain sleep is characterized by slow brain waves

　　C) birds can control their half-brain sleep consciously

　　D) birds seldom sleep with the whole of their brain at rest

　　12. According to the passage, birds often half sleep because ______________.

　　A) they have to watch out for possible attacks

　　B) their brain hemisphere take turns to rest 跨段

　　C) the two halves of their brain are differently structured 沒

　　D) they have to constantly keep an eye on their companions 反

　　13. The example of a bird sleeping in front of a mirror indicates that _____________.

　　A) the phenomenon of birds dozing in pairs is widespread

　　B) birds prefer to sleep in pairs for the sake of security

　　C) even an imagined companion gives the bird a sense of security

　　D) a single pet bird enjoys seeing its own reflection in the mirror

　　14. While sleeping, some water mammals tend to keep half awake in order to __________.

　　A) alert themselves to the approaching enemy

　　B) emerge from water now and then to breathe

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