Select missing words question type
This is very similar to the Drag and drop into text question type, but uses drop-down menus in the text instead of drag-boxes. This works well where the question text is very long, so you would have to scroll a lot to do drag and drop.
The Question text is written with two sets of square brackets '[[n]]' indicating the positioning of gaps and a number 'n' inside the brackets indicating the correct choice from a list which follows the question.
More documentation is available in the Open University's reference manual.