Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.
Currently rising temperatures in the Arctic and Antarctic are ------- of a still warmer world that could result from an excess of atmospheric carbon dioxide produced by the burning of oil, gas, and coal.
- polarities
- harbingers
- vestiges
- counterexamples
- aftereffects
Answer below
A harbinger is a sign of something yet to come. Temperatures are presented as “harbingers” in this sentence because they show that “a still warmer world” might be coming. (2)
Difficulty: Hard
Question Type: Sentence Completions
(Critical Reading)
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