If this is relatively static code treat it as such and put it in a file or template.
There are a couple of easy ways of doing this.
Via templates
Look at the way that WP does it – you have a folder called template-parts – insert your code there and call it in a template type. Assign that page to that template type.
Via a file
Above you mention this is for a single page. Look in your theme for page.php or singular.php single.php take that and create a template for that page yourself. You can create a file that will define that page by calling it page-{slug}.php or page-{id}.php.
A super basic version of this could be
<?php
get_header(); ?>
<main id="main" class="site-main" role="main">
<?php
// Start the Loop.
while ( have_posts() ) :
the_post();
// This will add your content you enter in the wp-admin side
the_content();
endwhile; // End the loop.
?>
<div class="Question">
<h3>1. I have the knowledge of procedures needed for starting and running a business <span class="star">
*</span></h3>
......................
ETC
</main><!-- #main -->
<?php
get_footer();