Fill in fields with placeholder text

[arcarruda]

How can users respond to a form within the text editor?
Example of a content:

How many wheels does a car have? [Answer here]
What is the color of the car? [Answer here]

I want the [Answer here] to be a placeholder, meaning that when the user places the cursor over this text, the cursor should be positioned right after the question mark, and the [Answer here] should disappear.