src: One might say, "I want to make sure I have the correct amount of meeting rooms;" another person says, "I want to make sure we finish on time;" another, "I want to make sure my boss coming from overseas is happy," and so on.
tgt: Podem ser: “Quero ter certeza de que tenho a quantidade correta de salas de reunião”; outra pessoa: “Eu quero ter certeza de que terminaremos a tempo”; outra, “quero ter certeza de que meu chefe vindo do exterior ficará feliz”, e assim por diante.