WordPress Twenty Twelve change Continue reading to post title

The default template of Twenty Twelve shows “Continue reading” at homepage, or category page. How to change “Continue reading” to post title?

Edit content.php, this file is just under the template of “Twenty Twelve”, find the following code:

<?php the_content( __( 'Continue reading <span>&rarr;</span>', 'twentytwelve' ) ); ?>

and change it to:

  <?php the_content( __( 'Continue reading [' . get_the_title($post->ID) . '] <span>?</span>', 'twentytwelve' ) ); ?>