TRAPDOOR TRANSLATION: Using Trapdoor in Textivate to make a multiple-choice translation rebuild activity

(Please scroll down to the bottom of the post to try the activity for yourself.)

This post refers to the optional text-based activity, Trapdoor, as introduced in this blog-post / user-guide:
http://textivate.posthaven.com/new-optional-text-activity-trapdoor

The end result of this blog post also requires you to include a parallel text translation in the L1 (which may or may not be divided into "chunks" by adding vertical pipes as in the example shown). See this user-guide on parallel texts and how to add them to your resource:
http://textivate.posthaven.com/parallel-texts-slash-extra-texts-along-with-a-textivate-resource

The procedure...

New optional text activity: Trapdoor :)

If you open a text resource or type in some text in the text tab on the textivate edit screen, you'll see a new "Trapdoor" button. Click this to add a Trapdoor activity to your resource.

A Trapdoor activity is a multiple choice activity where students click their way through the options to (re-)build the text. It is called Trapdoor because if they get a section wrong, they fall through the trapdoor and they have to start again.