Can give omissions for common grammatical words from blanking like the following,
articles like a, an, the...
prepositions like to, for,....
conjunctions and, while,....
  • no use in blanking and practicing such words!
or the best solution is to give the user the access to blank his preferred word.
and
give the user the freedom to start the practice from anywhere in the text so that they can concentrate on their priorities-now we have to start from the very beginning of the text everytime!