2014年4月24日雅思考试考前冲刺题及答案_第8页

　　The diagram beow shows people’s sleep and wake circle. Label the diagram by selecting NO MORE THAN TWO WORDS from Reading Passage 2 to fill each numbered space.

　　Write your answers in boxes 21-25 on your answer sheet.

　　the level of (21) decreased → (22) generates melatonin

　　→ melatonin is discharged in (23) and travels throughout the body

　　→ human body starts to feel sleepy

　　→ melatonin(24)at midnight and people fall deep asleep

　　→ the next morning, light shines through (25)

　　→ secretion of melatonin stops

　　→ human body wakes up

　　Questions 26-28

　　Choose THREE letters A-G.

　　Write the correct letters in boxes 26-28 on your answer sheet.

　　Which THREE aspects does the writer mention as associated with pineal gland apart from our sleep/wake cycle?

　　A breathing system

　　B rhythms of growth

　　C digestive system

　　D metabolism

　　E nervous system

　　F sexual activities

　　G mental activities