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Which option completes the text below correctly?
Air Force's first Grey Wolf patrol helicopter arrives at Malmstrom
The first field-ready MH-139 Grey Wolf arrived at Montana's Malmstrom Air Force Base earlier this month, marking the start of operations for a new fleet of aircraft designed to safeguard America's land-based nuclear missiles.
The MH-139 Grey Wolf helicopter, ______ replaces Vietnam War-era Hueys, will be used to patrol the intercontinental ballistic missile fields at Malmstrom; F.E. Warren AFB, Wyoming; and Minot AFB, North Dakota.
(Adapted from https://www.militarytimes.com)
Air Force's first Grey Wolf patrol helicopter arrives at Malmstrom
The first field-ready MH-139 Grey Wolf arrived at Montana's Malmstrom Air Force Base earlier this month, marking the start of operations for a new fleet of aircraft designed to safeguard America's land-based nuclear missiles.
The MH-139 Grey Wolf helicopter, ______ replaces Vietnam War-era Hueys, will be used to patrol the intercontinental ballistic missile fields at Malmstrom; F.E. Warren AFB, Wyoming; and Minot AFB, North Dakota.
(Adapted from https://www.militarytimes.com)
Resolução comentada
Pronome relativo não restritivo referente a coisa.
A oração entre vírgulas ('which replaces Vietnam War-era Hueys') é explicativa e se refere a 'helicopter', uma coisa. O pronome adequado é 'which'.
Análise das alternativas
A) 'what' não é pronome relativo nesse uso. C) 'who' é para pessoas. D) 'whom' é para pessoas, como objeto. E) 'whose' indica posse.
Referência: Relative pronouns.
Resolução comentada do VaiConcursos.