Select the most appropriate option to fill in the blank. He was very confident…

Answer: wasn't he?

Rule: Tag questions use the same auxiliary verb as the main clause and the opposite polarity.

• Apply the rule: the main clause is "He was very confident" (past tense with subject he), so the tag must use "was" + "he" in the negative form.

• "wasn't he?" is correct because it matches the auxiliary 'was', the subject 'he', and uses negative polarity.

• "wasn't it" is incorrect because the pronoun 'it' does not match the subject 'he'.

• "hasn't he" is incorrect because it uses the present perfect auxiliary 'has', which does not match the past-tense auxiliary 'was' in the main clause.

• "was he" is incorrect because it has the same positive polarity as the main clause; the tag must be negative.