Homophones are words that sound the same but are different words.
Examples:
flour and flower
ate and eight
bare and beer
<em>Tommorow</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>thing</em><em> </em><em>always</em><em> </em><em>coming</em><em> </em><em>but</em><em> </em><em>never</em><em> </em><em>arrives</em><em>.</em><em>.</em><em>.</em><em>.</em>
Among the choices, option B. Hasn't, is a singular contraction. "Hasn't" is the shortened word for "has not". The rest of the choices are plural contractions: Don't from do not, Haven't from have not, and Weren't from were not.