First to solve this question you have to know what the sentence means and it means<em> My grandfather insists that we sleep in his room while we visit the house. </em>So now that we know what the sentence means we will use process of elimination to cancel out all of the wrong answers.
So you just have to look at each one and basically know what they mean. So <em>dormemos</em> means let's sleep <em>durmamos </em>also means let's sleep and <em>duermamos </em>also means let's sleep, but the word <em>duermemos </em>means we sleep so the only logical answer to this problem is <u><em>duermemos.</em></u>
