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Choose the most appropriate option to fill in the blank in the given sentence:

The employees pull up their socks and work _______ harder during appraisals, in the hope of a promotion.

Solution

✅ Correct Option: 3

The blank modifies the comparative adverb harder, so an adverb of degree is needed. Apparent and considerable are adjectives and cannot qualify harder. Unreasonably carries a negative judgement that clashes with the hopeful tone about promotion. Significantly fits both grammatically and in sense.

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