Question

The changes in the purchases department will make a definite mark I am-------of it

Answer 1

The changes in the purchases department will make a definite mark I am assured of it

Explanation:

• The speaker of the line is certain that the changes in the purchases department will make a definite mark.

• This signifies that the blank must be filled with a word that shows certainty  while justifying the meaning of this sentence.

• So, by putting assured in the blank gives a complete and justified meaning to the sentence.