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Which interrogative pronoun should replace the blank space in the following sentence?: ___ threw the football?

Answer 1

The missing word is who or what.

To find out the missing interrogative pronoun first let's think of the sentence as if it was not a question.

If you were to fill in the missing word in an indicative sentence the missing part would be the subject, because this statement has a verb (threw) and an object (the football), so if in the indicative sentence a subject is missing.

In the interrogative sentence we would have to ask about the subject using who (or rarely what if the subject was an animal or a machine)

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