বই Four Corners 4 - ইউনিট 10 পাঠ B

without any uncertainty

an official who is in charge of a game, making sure the rules are obeyed by the players

a person

used to introduce a new topic or information that is related to the ongoing conversation

এটা বলা বাহুল্য,তথ্য দিচ্ছি

to contact someone again later to provide a response or reply, often after taking time to consider or research the matter