Correct Answer: A

Rationale: The word 'work' (option A) is the most suitable choice for the sentence. The sentence is in the simple present tense and is discussing a general scenario or experience. The present simple tense is used to describe habits, routines, or general truths. Therefore, the word 'work' best fits in this context to indicate a general experience at County Medical without specifying a particular timeframe. Choices B, C, and D create incorrect tenses or imply specific past actions, which do not align with the intended meaning of the sentence.

Correct Answer: C

Rationale: The word 'deserve' should be used instead of 'deserves' to match the plural subject 'few'. The subject 'few' is plural, so the verb should also be plural. Therefore, the correct sentence should be 'but only a few deserve their degrees.' Choices A, B, and D are used correctly in the sentence and do not need any changes.

Correct Answer: C

Rationale: In this sentence, the pronoun should refer to Luis, who borrowed the money. Since Luis is a male, the correct pronoun to use in this context is 'him.' Therefore, the correct answer is 'him.' Choices A, B, and D are incorrect as they do not match the gender of Luis or do not make sense in the context of the sentence.

Correct Answer: B

Rationale: The word 'enthusiastic' is used incorrectly in the sentence. It should be 'enthusiastic' instead of 'enthusiastically' since it is describing Jeremiah's state of being, not an action he performed. Adverbs like 'enthusiastically' are used to modify verbs, not adjectives like 'enthusiastic'. The other choices ('seemed,' 'astonishing,' 'success') are all used appropriately in the sentence and do not need any correction.

Correct Answer: C

Rationale: The correct answer is C: 'will be delighted.' In this context, the sentence is expressing a future possibility of graduating early, so the phrase 'will be delighted' in the future tense is the most appropriate choice to match the context. Choices A, B, and D are incorrect because they do not convey the future tense needed in this sentence. Choice A ('are delighted') is in the present tense, choice B ('were delighted') is in the past tense, and choice D ('will have been delighted') uses a more complex future perfect tense which is not necessary in this context.