Jawaban paling cerdas!
Yes, I am certain.Of, course.I'm positive.She must be excellent at mechanics.I'm absolutely sure.It's certain that she is a good mechanic.I'm sure about it.I'm quite sure that he told the truth.I'm absolutely sure about the news.I'm no doubt about it.I'm absolutely certain that he told the truth.I'm sure/certain about .....I've no doubt about.....
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