var all="";
var k = 0;

function grab() {
    k++;
    console.log(k);

    return $.get("https://www.memrise.com/course/48407/upper-intermediate-english/"+k)
        .always(function (y) {
            var s="";
            for (var i=0; i < $(y.responseText).find(".thing").length; i++) {
                s += ($(y.responseText).find(".thing .col_b")[i].innerText + "***" + $(y.responseText).find(".thing .col_a")[i].innerText);
                s += "\n";
            };
            all += s;
        });
}

var p = grab();
for (var kk=2; kk <= 67; kk++) {
    p = p.always(function () {
        p = grab();
    });
}