Cambridge ielts 1-15 series reading answers explained

18. Answer: I
Explain 
· Key words: interest, insect, research, benefit, wildlife
· The relation between insect research and wildlife (wilderness) can be found in paragraph I. The 
author claims that his main motivation for insect research is actually wildlife conservation, because 
“all species, however small and seemingly insignificant, have a right to exist for their own sake”. Thus, 
by showing the practical value of insect research, people would appreciate nature more, and wildlife in 
general will benefit. 
19. Answer: B
Explain 
· Key words: reason, nature-based, medicine, fell out of favour 
· According to paragraph B: “for a while, modern pharmaceutical science moved its focus away from 
nature” 
· For a period = for a while = trong một thời gian 

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· Medicine = pharmaceutical science = dược phẩm 
· The term “moved its focus away” means that natural medicine was no longer the focus of 
pharmaceutical science. Attention „shifted‟ to the design of chemical compounds in the laboratory. In 
other words, it fell out of favour. 
20. Answer: E
Explain 
· Key words: example, insect-derived, medicine 
· Paragraph E mentions several promising compounds derived from insects, such as alloferon, which 
is used in Russia and South Korea. Hence, paragraph E gives an example of an insect-derived 
medicine in use at the moment. 
Questions 21-22
Answer: 
B
. the variety of substances insects have developed to protect themselves, 
C
. the potential to 
extract and make use of insects‟ genetic codes 
Explain 
· Key words: what, make, insects, interesting, for, drug research 
· Although using insects for drug research is challenging, it is also interesting and potentially useful. 
In paragraph G, the author mentions that many insects can release compounds to subdue their prey or 
to deal with pathogenic bacteria and fungi. This means that humans can make use of these compounds 
to produce antibiotics. Thus, B is one correct answer. Another benefit from insect research is that we 
can extract useful compounds by snipping out insect DNAs and inserting them into particular cells to 
allow larger production. Therefore, C is correct.