Use of English: Part 3 Word Formation
For questions 28 - 37, read the text below. Use the word given in capitals at the end of some of the 
lines to form a word that fits in the gap in the same line. There is an example at the beginning (0). 
Write your answers IN CAPITAL LETTERS on the separate answer sheet. 

Example: 

Sleep 
Although (0) ___________ have investigated sleep for many years there is, 
as yet, no definite explanation as to why we sleep. The fact that 
we spend about eight out of every 24 hours asleep, though, suggests 
that there are powerful (28)____________ reasons for its continuing 
	(29) _____________ Most theories that seek to explain sleep centre on the 
	(30) ___________ effects that sleep has on the brain; this is because there is little 
	(31) __________ of any direct physiological effects on the body. 
However, lack of sleep can cause problems. One theory about the effects of 
	sleep (32) ___________ is that brain circuitry needs to be repaired regularly and                     
	when this does not take place, that is, when a person has (33) _________ nights, 
	things begin to go wrong. Indeed, there is a (34) _________ change in behaviour 
when people lack sleep; they take more risks, and tend to react to events 
	(35) _________ rather than with logic. 
	Although a lack of sleep would clearly seem to be (36) _________, research 
projects have, nevertheless, looked into the possibility of reducing the time 
	we need for sleep. (37) ____________ chemical compounds that keep people 
awake - such as amphetamines and caffeine - have been examined but, so far, 
there has been no discovery of a drug capable of allowing people to do 
without sleep. 

SCIENCE 
EVOLUTION 
EXIST 
BENEFIT 
PROVE 
DEPRIVE 
SLEEP 
SIGNIFY 
EMOTION 
HEALTH 
VARY