Let's say I am with three other people. Then another person joins us. I could say:<br/><br/>"That makes five people."<br/><br/>"That makes it five people."<br/><br/>Separately, let's say a sports team just lost another game, after previously losing four games. I could say:<br/><br/>"That makes five losses in a row."<br/><br/>"That makes it five losses in a row."<br/><br/>What is the prevailing thinking on "it" here? How necessary is "it"?