decline
Book 19 Test 4
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50 words
Cambridge Book 19
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Book 19 Test 4
Important IELTS words
conservationists
Book 19 Test 4
knock-on effects
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ecosystem
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lifecycle
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phenology
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advancing
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abundance
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flexible
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endangered
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pathogenic
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antibiotic-resistant
Book 19 Test 4
breakthrough
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exploit
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biodiversity
Book 19 Test 4
sustainability
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sediment plumes
Book 19 Test 4
hydrothermal vents
Book 19 Test 4
ramifications
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excavate
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selfish
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altruism
Book 19 Test 4
egalitarianism
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ostracise
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innate
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hierarchical
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cooperation
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disparities
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accumulate
Book 19 Test 4
ulterior motives
Book 19 Test 4
ruthless
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prevalent
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patriarchy
Book 19 Test 4
evolutionary
Book 19 Test 4
hunter-gatherers
Book 19 Test 4
vast
Book 19 Test 4
reproduce
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cope
Book 19 Test 4
bioactive
Book 19 Test 4
crucial
Book 19 Test 4
grave
Book 19 Test 4
assumption
Book 19 Test 4
autonomy
Book 19 Test 4
sediment
Book 19 Test 4
abyss
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vent
Book 19 Test 4
superbugs
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prospecting
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discharged
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prevalent
Book 19 Test 4