60. What do we infer is the author's attitude to the technology?
A. It has improved our purchasing power
B. It has improved our quality of life.
C. It has created more jobs
D. It is not responsible for the recession.
II. Choose the best answer from A, B, C or D to fill in the gaps in the following passage.
Scientists used to believe that our 24-hour cycle sleeping and walking was _________
(61) entirely by external factors. The most notable of these, they thought, were the rising and
_________ (62) of the sun. But they have now established that there is a daily rhythm to a
wide range of biological function – including temperature, digestion and mental (63)
_________ - which are regulated internally by a special time-keeping mechanism within the
brain.
The main function of this “ body clock” is to anticipate and prepare for external
changes so that, for example, our body temperature starts to rise _________ (64) dawn,
gearing up for the day, and begin to _________ (65) in the early evening, winding us down
for sleep.
Some people’s body clocks _________ (66) poorer time than others, which can greatly
disturb their lives and even threaten their health. Insomnia, depression, fatigue, poor work
performance and even accidents can all be _________ (67) or aggravated by inaccurate body
clocks.
Equally, severe problems can result from the difficulties of _________ (68) to
different time zones and working by night instead of by day. Shift workers are known to run a
higher-than-average _________ (69) of having a number of health problems and the
disruption of _________ (70) body rhythms is one possible explanation for this
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