<p>Is the following sentence grammatically correct as is on the SAT:</p>
<p>It does not sweat as much as other animals.</p>
<p>Also:</p>
<p>I am smarter than him.</p>
<p>1) no. “It” requires an antecedent (except for “it is [adj]” construction). You could also phrase it “as much as do other animals” or “as much as other animals do.”</p>
<p>2) no. the second pronoun must be in the objective case–“I am smarter than he [is].”</p>