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Fill in the Blank

The user fills in a blank with a word or phrase.

Evaluation

  • Case-insensitive comparison with trim.
  • correctAnswer accepts a string or an array of alternatives.
  • Score: 0 or 10 (binary).

Single alternative

{
  "exerciseId": "ex_002",
  "area": "grammar",
  "type": "fill_blank",
  "answer": "WENT",
  "correctAnswer": "went"
}

Multiple alternatives

Useful for synonyms or accepted verb forms:

{
  "exerciseId": "ex_002b",
  "area": "grammar",
  "type": "fill_blank",
  "answer": "goes",
  "correctAnswer": ["went", "go", "goes"]
}

Correct if the answer matches any alternative.

Responses

// Correct
{ "correct": true,  "score": 10, "feedback": "Correct!",             "metadata": { "area": "grammar", "type": "fill_blank" } }


// Incorrect
{ "correct": false, "score": 0,  "feedback": "Incorrect. Try again.", "metadata": { "area": "grammar", "type": "fill_blank" } }