Cambridge ielts 1-15 series reading answers explained

10. Answer: mobile
Key words: unintended, psychological difficulties, less
The “psychological barriers” are mentioned in paragraph E as an effect of the guard rails, and they 
“greatly impact those that are the least mobile”, suggesting that psychological difficulties are 
unintentionally created for less mobile people. Therefore, “mobile” is the answer here. 
difficulties = barriers 
11. Answer: dangerous
Key words: cross the road, way
The guard rails are also observed to “encourage others to make dangerous crossings”. As “making 
crossings” is the same as the act of “crossing”, “dangerous” is the adjective that describes this action of 
crossing the road. Thus, the blank should be filled with “dangerous”. 
cross = make crossings 
12. Answer: communities
Key words: separate, difficult, introduce
The drawbacks of guard rails are mentioned near the end of paragraph E, showing that they “divide 
communities and decrease opportunities for healthy transport”. As “divide” has the same meaning as 
“separate”, the noun that should be filled in gap 12 is “communities”. Moreover, to “decrease 
opportunities” could be understood as to “make it more difficult”, which means making it hard to 
introduce healthy forms of transport. Therefore, “healthy” should be filled in gap 13. 
separate = divide 
Answer: communities – healthy 
13. Answer: healthy
Key words: separate, difficult, introduce
The drawbacks of guard rails are mentioned near the end of paragraph E, showing that they “divide 
communities and decrease opportunities for healthy transport”. As “divide” has the same meaning as 
“separate”, the noun that should be filled in gap 12 is “communities”. Moreover, to “decrease 
opportunities” could be understood as to “make it more difficult”, which means making it hard to 
introduce healthy forms of transport. Therefore, “healthy” should be filled in gap 13. 

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493 
separate = divide