Questions 1-10

 6  employment: ‘These companies provide them 
[= 100,000 people] with regular employment, 
without which communities will not survive.’ 
‘Communities’ might be tempting, but the word 
does not collocate with ‘fisheries give’.
 7  bacteria: ‘In the past, people admired its beautiful 
green-blue colour. However, the water now has a  
red tint [= the colour has changed]. The reason for 
this [= change] is that bacteria quickly multiply in 
the warm waters of a shallow lake.’
 8  Tourism: ‘As a result, in the last decade, there has 
been a downturn [= a decline] in tourism in the 
area, an industry many people depended on.’
 Distraction 
‘Industry’ cannot be used in the space 
because this would imply that all kinds of industry 
were affected.
 9  TRUE: ‘While scientists had suspected [= believed] 
that Poopó would eventually run dry [= finally 
disappear], they didn’t expect that this would occur 
for at least another thousand years.’
10  nOT giVEn: We are only told that ‘The local mining 
industry had already contributed to [= added to] the 
pollution of the lake,’ but there is no information 
about any steps or activities to reduce its impact.  
11  TRUE: The writer explains that ‘On average, the 
surface water of the world’s lakes has gone up in 
temperature by 0.34°C every ten years.’ The writer 
says that this trend is seen in Lake Tanganyika – but 
this lake is ‘by no means [= certainly not] the most 
extreme example’. He then says that ‘This [= the 
most extreme example] would be Lake Fracksjön 
in Sweden, where an increase of 1.35°C per decade 
has been observed.’
12  FALSE: ‘The cause of [= the reason for] the lake’s 
decline has not yet been established [= no-one is 
sure why it happened], but drought is among the  
suspects’ [= drought is a possible reason, but no-
one is certain].
13  nOT giVEn: We are only told that ‘Clay, sand and 
other fine material plugged [= blocked/filled] the 
hole and the lake started to fill with water again.’ 
We don’t know whether it was rain that refilled the 
lake, or whether it was refilled by other means, e.g. 
pipes/hoses.