Hello @MalenaM
We might need some more information or screenshots of what you are seeing here with your Fill In The Blank type questions.
With Fill in the blanks questions, the answer just needs to be surrounded by backticks( ` ) to indicate where the student will fill in the answer. E.g. "Roses are `red`, violets are `blue`" in which the words Red and Blue will be the fill in the blank answers.
Do you happen to have some examples of the answers you are surrounding with the backticks that you can provide us with? We can try to test them out and see if there are any possible solutions.
HERE is the Canvas guide on setting up Fill in The Blank questions on New Quizzes.
-Colton