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Farms: presente contínuo no singular (A2)

Farming is changing fast. On many modern farms, machines drive themselves and follow maps from satellites. Right now, an engineer in the south ___ a robot that picks strawberries without breaking them. Farmers also use small planes to check their fields. All this technology saves water and time, but good farmers still walk through their crops.

Fonte: English for ALL (texto original).

Assinale a alternativa que completa corretamente a lacuna do texto.

  1. A) is testing
  2. B) are testing
  3. C) is test
  4. D) is tested
  5. E) be testing
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Resposta correta: A

A expressão right now pede o presente contínuo, formado por to be + verbo com -ing. Como o sujeito an engineer é singular, o auxiliar correto é is, o que elimina are testing. A opção is test não tem a terminação -ing, e is tested seria uma voz passiva, incompatível com o objeto direto a robot que aparece logo depois.

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