Quiz: 'fill in the gap' questions are difficult for screenreaders when the gap is in the middle of a sentence because in 'forms mode' it may not read beyond the gap. There is no technical solution to this so screenreader users may need guidance and support on how best to deal with this type of question.
Suggestion 1): Insert an icon with alt text before the question to explain things: (enter missing word)
Suggestion 2): Add documentation/help so that question creators know about the issue:
NO: She details a number of [field] procedure calls...
YES: She details a number of X procedure calls [field]