如何获得2x2单选按钮？

Question

我正在创建一个多项选择测验，每个问题有4个答案。而不是答案是每行1个答案，我希望它们每行2个问题，因此div标签中放置的空间更少。我怎么能这样做？

case 3:echo"  <h6>How many albums has Marley released?:</h6>
<h6><input type='radio' name='Q6' value='16' />Sixteen (16)</h6>
<h6><input type='radio' name='Q6' value='5' />Five (5)</h6>
<h6><input type='radio' name='Q6' value='3' />Three (3)</h6>
<h6><input type='radio' name='Q6' value='24' />Twenty-Four (24)</h6> ";
break;

Answer 1

在css中

h6:nth-child(1) {
    display:block;
    width:100%;
    clear:both;

}
h6 {
    width:50%;
    display:block;
    float:left;   
}