How to Master the ielts

Q59 
major concern
(paragraph D). The answer is 
‘major concern’
because the 
first sentence of paragraph D
includes the key words, harm, sonar and 
major concern, which are found in the summary in reverse order.
Q60 
training exercise
(paragraph D). The answer is 
‘training exercise’
because 
the phrase
‘number of beachings have been seen to increase’
, in the 
summary is the same as 
‘stranding occurs more frequently’
in the passage.
Q61 
common sense
(paragraph D). The answer is 
‘common sense’
because
‘the impact of sonar on mammals can be lessened’
can be likened to 
‘take 
steps to minimize 
the effects of sonar on mammals
’
wherever possible. 
Most of 
these 
precautions
 are common sense
.

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HOW TO MASTER THE IELTS
204
Q62 
migration routes
(paragraph D). The answer is 
‘migration routes’
because
‘keep away from migration routes’
fits with 
‘avoiding whale migration routes’
.
Q63 
navigation
(paragraph E). The answer is 
‘navigation’
because
‘mistakes 
in navigation’
are 
‘navigation errors’
, and 
‘changes in the earth’s magnetic 
compass’
is the same as 
‘fluctuations in the earth’s magnetic field’
.
Q64 
predators
(paragraph E). The answer is 
‘predators’
because the phrase
‘straying into shallow water’
appears in both the summary and the passage 
and 
‘perused by’
fits with 
‘attempting to escape’
.