<ol>
<li>''Everybody is on his best behavior during a college interview.''</li>
<li>''Everybody is on their best behavior during a college interview.''</li>
</ol>
<p>Should I use ''his'' or ''their''?</p>
<p>Both are correct…it depends if you are speaking of 1 person as in “his”, or more as in “their.”</p>
<p>I think it’s “their” because you are talking about everybody, third person.</p>
<p>his is correct. Everyone is singular, thus you cannot use their.</p>
<p>What cavsfan said, Everybody = every single body = singular. </p>
<p>although to make it PC, one really should do his/her</p>
<p>It should be his.</p>
<p>correct would be “his or her”, for subject-pronoun agreement</p>
<p>It should say his/her.</p>
<p>None. It is supposed to be ‘his or her’</p>
<p>His or her unless stated that everyone there is male or female. Notice How I said “everyone is”; you’re not supposed to say “everyone are”</p>