BASEADO NOS EXEMPLOS COMPLETE A DEFINIÇÃO DE 'SINCE' E 'FOR'.
1- SlideShare has been available ''for'' several years
2- Wikipedia has been available ''since'' 2001.
a- When we want to refer to a period of time, we use ……………., as in example 1. b- When we want to refer to a pointe in time , we use …………………, as in example 2.
Soluções para a tarefa
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Resposta:
a- for
b- since
Explicação:
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