Cambridge 15 Test 4 takes you from Peruvian dryland ecology to a whistled language and finally to corporate environmentalism. Passage 1 follows the return of the huarango tree to the arid valleys of southern Peru. Passage 2 documents Silbo Gomero, the whistle language of La Gomera in the Canary Islands. Passage 3 examines the environmental practices — and incentives — of large corporations.
Note completion dominates again, with twelve gaps in total. Passage 1 mixes five note completions, a three-gap table and five True/False/Not Given. Passage 2 has six True/False/Not Given and seven note completions — do the True/False set first, since the topic flow is linear. Passage 3 finishes with a five-gap summary, four multiple choice and five Yes/No/Not Given. Yes/No/Not Given is decisive here because the writer takes a clear stance on corporate accountability.
Spend nineteen minutes on the huarango, twenty on Silbo, twenty-one on big businesses, with no slack. The Silbo passage is dense with technical vocabulary about whistled tones, so highlight the key terms on a single first read rather than re-reading. Whistled language carries across canyons; clear marking carries you across forty answers.
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