Three theories about sleep

For questions 1-8, read the text below and decide which answer (A, B, C or D) best fits each gap. There is an example at the beginning (0).

 

Three theories about sleep

 

People spend about one-third of their lives asleep. It seems certain, therefore, that sleep has a (0)_B)_VITAL_ function. However, what that function might be is still in (1)__________. Scientists are far from being in agreement about (2)__________ why so much of our precious time is given over to sleep.

 

There seem to be three main theories. The most popular states that the functions and (3)__________ of sleep are primarily physiological. It claims that we sleep in order to (4)__________ the health of our body. In other words, biological processes work hard as we sleep to repair any damage done during the day and to restore ourselves to (5)__________ efficiency. However, a second theory places more emphasis on the learning benefits of sleep. This theory holds that sleep allows us to process the information that we (6)__________ during the day, and asserts that, without sleep, learning would not take place. A third popular theory is (7)__________ on ideas about energy, saying that we need (8)__________ of sleep in order to, in a sense, recharge our batteries and so have an adequate supply of energy for the coming day.

0.- A) chief          B) vital      C) principal  D) focal

1.- A) discussion B) dispute  C) argument D) debate

2.- A)correctly  B)absolutely C)actually D)precisely

3.- A) purposes  B) targets  C) intentions D) points

4.- A) take       B) maintain     C) stay       D) keep

5.- A) strong     B) utter           C) full       D) entire

6.- A) achieve   B) complete   C) reach    D) acquire

7.- A) rooted  B) supported  C) based  D) developed

8.- A) periods    B) eras    C) moments   D) episodes

 

O’Dell, Felicity (2015) Reading and Use of English Test 1 Part 1. 2^nd edition. Cambridge University Press: Dubai. Pages 12 and 13.