Question

1- Assinale a alternativa correta. *

I studied for this test since seven days straight.

I have been calling my mother since half an hour.

Her grandparents walk for thirty minutes a day.

He has worked there for he finished college.

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Answer 1

Resposta:

''Her grandparents walk for thirty minutes a day.''

espero que esteja certo e que eu tenha ajudado.

Explicação: A concordância gramatical dessa é a única correta entre as opções.