While manually creating a Fill-in-the-Blank exercise to your content, you will have the option to add 4 different types of input for your question:
Text - To add a phrase
Image - To insert an image to your question (you can upload or insert a link)
Video - To insert a video to your question (you can upload or insert a link)
Audio - To insert an audio to your question (you can upload or insert a link)
Choose a type of input to insert
Insert the content of you question
Move to the answers section
Enter the phrase you want to hide a word/expression in
Select the word/expression you want to hide
Click on "Add fill in the blank"
Move to the Explanations section
Enter the reason why the question is true or false (optional)
Click on Save