Choose the correct form of adverb for the given sentence:
The postman _____ argued that the address was wrong.

- 'Repeated' is not an adverb. It will act as a verb only if used in the sentence.
- 'Unbelievably' is an adverb that means too improbable for belief or as in incredibly, inconceivably.
- 'Strongly' is an adverb that means in a vigorous and forceful manner.
- 'Slow' is not an adverb. It will act as an adjective only if used in the sentence.
- The verb 'argued' means to state (something) as a reason in support of or against something under consideration.
- Hence, the option 'Strongly' is the correct adverb.
- Correct Sentence: The postman strongly argued that the address was wrong.