Feeling 'under the weather' means feeling ill, so taking a day off to rest is the most logical follow-up.

Working tirelessly typically leads to achieving goals, making option 0 the most logical conclusion.

'Affect' is the correct verb meaning to influence something.

'Benevolent' means kind and well-meaning, making 'kind' the correct synonym.

'Industrious' means hardworking and is a synonym for 'diligent'.

'Barking up the wrong tree' means to pursue a mistaken or misguided course of action.

'Caught between a rock and a hard place' means being faced with two difficult choices.

The word 'optimistic' best fits the context of the sentence, as it describes someone who looks on the bright side.

The correct word is 'eyes' as it fits the context of being tired.

'Determined' is the correct adjective to describe his resolve to finish the project.

'Caustic' refers to remarks that are harshly critical, which fits the context of the sentence.

'Submit' is the correct word as it means to hand in work.

The correct answer is 'innovative' as it is the adjective form that describes the teacher's approach.

'Groundbreaking' indicates that the findings were innovative and significant.

'Clear' is the best fit, as it indicates that the explanation was easy to understand.

'Challenging' is a synonym for 'difficult', indicating something that requires effort.

'Benevolent' means kind and generous, so 'kind' is the best synonym.

'Joyful' is a synonym for 'happy'.

'Thorough' is a synonym for 'meticulous', meaning showing great attention to detail.

'Arduous' means requiring a lot of effort, so the opposite is 'easy'.

'Kind' is a synonym for 'benevolent'.

'Hardworking' is a synonym for 'diligent', indicating someone who puts in a lot of effort.

'Definately' is spelled incorrectly; the correct spelling is 'Definitely'.

'Diligent' refers to someone who is hardworking and careful, while 'lazy' describes someone who is unwilling to work or put in effort.

'Expand' means to increase in size or volume, while 'contract' means to decrease in size or volume.

'Frequent' means occurring often, while 'rare' means occurring infrequently.

'Sincere' means free from pretense or deceit, while 'insincere' means not expressing genuine feelings.

'Transparent' means allowing light to pass through, while 'opaque' means not able to be seen through.

Cold is associated with ice, while hot is associated with steam.

The idiom 'bite the bullet' means to face a painful or unpleasant situation bravely.