-The teacher would let the students know <span style="color:#ff0000;">who</span> the presenters <span style="color:#ff0000;">are</span> in due course. <br/><br/>Could I make it more succinct by deleting <i>who</i> and <i>are</i>?(my doubt is, deleting them would make <i>know</i> sound like <i>making the acquaintance of</i>)