css html 5摆脱列

Question

在下面的代码中，我想摆脱列和添加约4段文字。 但是，当我这样做现在整个网站的结构已经毁了。

   <div class="three_column_layout"> 


       <div class="col_1"> 
       <p>This is a three columns example. 
       Praesent gravida venenatis felis sed egestas.</p>    
       </div> 
       <div class="col_1"> 
       <p>This is a bold text. 
       Sed ac tortor lobortis sem gravida consequat et vel mi.</p>    
       </div> 
       <div class="col_1"> 
       <p>This is an italic text sample. 
       Curabitur arcu orci, iaculis vel bibendum gravida tortor lobortis.</p>    
      </div> 

       <div class="clear"></div> 
       <!-- Use this clear div to separate rows of content --> 

       <div class="col_1"> 
       <p class="black_box">This is the black box  
       styling. I use it for my private messenger 
       and also my group chat feature.</p> 
       </div> 
       <div class="col_2"> 
       <p>Sed lacus est, iaculis sed sagittis ac 
       malesuada a felis. Vestibulum vitae dictum mauris. Aenean 
       felis nisl, pulvinar quis blandit et, fermentum ut tortor. 
       In condimentum nisi ut leo fermentum ornare. 
       Praesent gravida venenatis felis sed egestas.</p> 
       </div> 

Answer 1

<div class="three_column_layout">没有匹配的结束</div>