The 'Guidelines for writing gap filling test items' states: 'For example, if the question setter wants to test the article, then there will be a gap at the position of a, an, the or before a noun that does not take any article.'
Class 6 › English Grammar and Composition › Chapter 11: Answer Key, Sample Question and Guidelines › Topic: Guidelines for Gap Filling (with/without clues)
Aligned to the NCTB national curriculum.