(AFA - 2010)
All light on the night
Our cities and towns are far from silent at night. As most of______are going to bed, a lot ofworkers are just going to their jobs. It is estimated that up to a fifth of the working population carries out its duties at night - running hospitals and maintaining power stations, for example.There is one problem: They have the same biological clock as day workers. Night workers often have trouble sleeping through the day, and sometimes find______harder to stay awake, whichmeans mistakes are more likely to happen. Dr Lawrence Smith, a psychologist, discovered that among people who do the same job, night workers suffered 20% more injuries than day workers. [15] He is now testing the theory that the light canbe used to fool the human body clock. The body clock appears to be influenced by light, because one chemical at its disposal is sensitive to light.
Adapted from Advance your English
The Passive Voice of the sentence 'He is now testing the theory...' (line 15) is
Now the theory was testing by him.
The theory was now tested.
The theory is being tested now.
He tested the theory.
Gabarito:
The theory is being tested now.
A) INCORRECT: pois o uso de "was testing" se refere a algo que foi empregado no passado e teve continuidade no passado, o que demonstra que não é a forma correta de se referir na voz passiva à ação indicada, que é uma ação contínua no presente.
B) INCORRECT: pois a ação da teoria ser testada não está terminada, o que não permite utilizar a forma "was tested" na voz passiva.
C) CORRECT: pois a oração foi colocada corretamente na voz passiva, em que o sujeito paciente (the theory) conjugado o verbo mantendo a conjugação de uma ação contínua (is being) e o verbo principal corretamente marcado no particípio (tested).
D) INCORRECT: pois essa ação está colocada na voz ativa e indica uma ação que terminou no passado.