<span style="color:rgb(20,20,20);background-color:rgb(254,254,254);">Hi there, which of the following sentences sounds natural?</span><br style="color:rgb(20,20,20);background-color:rgb(254,254,254);"/><br style="color:rgb(20,20,20);background-color:rgb(254,254,254);"/><span style="color:rgb(20,20,20);background-color:rgb(254,254,254);">1- Nowadays, John is studying more than he </span><b style="color:rgb(20,20,20);background-color:rgb(254,254,254);">used to do</b><span style="color:rgb(20,20,20);background-color:rgb(254,254,254);">.</span><br style="color:rgb(20,20,20);background-color:rgb(254,254,254);"/><br style="color:rgb(20,20,20);background-color:rgb(254,254,254);"/><span style="color:rgb(20,20,20);background-color:rgb(254,254,254);">2- Nowadays, John is studying more than he </span><b style="color:rgb(20,20,20);background-color:rgb(254,254,254);">used to.</b>