Scientist used to believe that our 24-hour cycle of sleeping and walking was governed entirely external factors
Question 77: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each numbered blank.
Scientist used to believe that our 24-hour cycle of sleeping and walking was governed entirely external factors. The most notable of these, they thought, were the rising and (23) of the sun. But they have now assured that there is a daily rhythm to a wide range of biological functions - including temperature, digestion and mental activity
The main function of this “body clock” is to anticipated and (24) for external changes so that, for example, body temperature starts to rise (25) dawn, gearing us up for the day, and begins to fall in the early evening, winding us down for sleep.
Some people’s body clocks keep poorer time than others, which can greatly disturb their lives and even (26) their health. Insomnia, depression, fatigue, poor work performance and even accidents can all be (27) or aggravated by inaccurate body clocks.
Question 23:
A. dipping
B. descending
C. setting
D. diving
Question 24:
A. prepare
B. dispose
C. scheme
D. steady
Question 25:
A. nearly
B. beside
C. approximately
D. around
Question 26:
A. spoil
B. risk
C. injure
D. threaten
Question 27:
A. formed
B. made
C. caused
D. put