How come 'it' is compatible with the plural subject? How does 'it' work in these cases? <br/><br/>1. <b>It </b>is a lot of <b>things </b>to do.<br/><br/>2. People ignorant to the sport seem to think<b> it</b> is a lot of <b>cars</b> colliding into one another.<br/><br/>Thanks.