Directions: For each of the following sentences, there are four choices. Please choose the best choice according to Text A to complete the sentence.The author compared our bodies to clocks to show __________ of our systems.

A. the precise accuracy
B. the slight differences
C. the puzzling complexity
D. the personal conditions

Chronobiologists can tell you the following except __________.

A. when to eat and still lose weight
B. when to effectively handle the toughest challenges
C. when to get a painless dental treatment
D. when to exercise for maximum effect

To draw a body-temperature chart, we need __________ readings.

A. 6
B. 5
C. 4
D. 3

Reading and reflection are better pursued when your body temperature is __________.

A. on the rise
B. at the peak
C. steady
D. falling

Chronobiology reveals the importance of __________.

A. drawing body-temperature charts every day
B. synchronizing our activities with our circadian rhythms
C. eating our breakfast if we want to stay healthy
D. avoiding taking too many sleeping pills

Directions: Please scan the text anduse the words with corresponding capitalized lettersin the following tableto fill in the blanks.What does it mean?Instead of performing at a steady, unchanging rate, our body systems function on an approximately 25-hour1 . Sometimes we are accelerating, sometimes slowing down. We achieve peak efficiency for only a limited time each day. Physician-biologist Franz Halberg called these 2 patterns "circadian rhythms."How can it be applied?Circadian principles have been applied to astronauts' work schedules on most of the space-shuttle 3 .In order to achieve our best with the least effort, we should know our rhythms and4the demands of our activities with our biological capacities.We do our best 5work when our rhythms are at their peak. We should schedule our most demanding activities when our temperature is highest.For6activities, the timetable is more complicated. Precision tasks, such as mathematical work, are best 7 when our temperature is on the rise. By contrast, reading and reflection are better pursued when body temperature usually begins to fall.Breakfast should be our largest meal of the day for effective 8. Calories burn faster one hour after we wake up than they do in the evening.Caffeine, alcohol and medicines are processed 9at different time of day too.Knowing our rhythms can also help us overcome 10problems.

Directions: Read the following statements and then decide whether each of them is true or false based on the information in the text. Mark T for True and F for False.1)_____Charles Winget got up early because he needed to go to his office in Silicon Valley.2)_____Franz Halberg didn't think that personal eccentricities or early conditioning could explain different body function patterns.3)_____Charles Winget knew circadian rhythms well because he was an astronaut in NASA.4) ____To know your body's pattern, you need to record your temperature every four hours for a day.5) ____You will notice that your body temperature varies significantly during a day.6)_____If you know well about your circadian rhythms, you can take advantage of chronobiology techniques to improve your health and productivity.7)_____Mental activities are best tackled when your temperature is on the rise.8)_____Eating breakfast helps losing weight.9)_____Caffeine has the most impact around 6 in the afternoon.10)_____Most people have the lowest body temperature between 11 p.m. and 2 a.m..