Correct Answer: D

Rationale: The correct answer is D (Henry) because the adjectives 'strong and healthy' describe 'Henry.' In this sentence, 'Henry' is the subject being described as strong and healthy, not 'weeks,' 'his,' or 'surgery.' While 'weeks' and 'surgery' are nouns mentioned in the sentence, they are not the nouns being described by the adjectives in question. 'His' is a possessive pronoun referring to Henry and does not match the criteria of being directly described by the adjectives 'strong and healthy.' Therefore, 'Henry' is the noun that the adjectives specifically describe in this context.

Correct Answer: D

Rationale: The correct answer is D: At a Parent-Teacher meeting. A Parent-Teacher meeting is a formal setting where professional communication is expected. Using formal language in this context shows respect and professionalism. Choices A, B, and C involve informal or casual situations where using formal language may not be necessary or appropriate. Texting a friend, attending a family reunion, or Skyping with grandparents are typically more informal interactions where a more relaxed communication style is acceptable.

Correct Answer: B

Rationale: The correct answer is B: 'The cat slept on the mat; she purred softly.' This sentence is a run-on because it contains two independent clauses ('The cat slept on the mat' and 'she purred softly') without proper punctuation. Choice A is incorrect as it is a compound sentence with a coordinating conjunction 'and' joining two independent clauses. Choice C is also incorrect as it is a compound sentence connected by a coordinating conjunction 'so.' Choice D is not a run-on sentence; it is a compound sentence with a coordinating conjunction 'or' joining two independent clauses.

Correct Answer: B

Rationale: The correct answer is B, 'He ate a lot on vacation, but he did not gain any weight.' The conjunction 'but' is used to show a contrast between the two clauses. Choices A, C, and D do not effectively demonstrate the contrast between eating a lot and not gaining weight, making them incorrect. Choice A introduces a conditional relationship that is not present in the original sentences. Choice C implies a causal relationship that is not intended. Choice D also suggests a causal link that is not appropriate given the context.

Correct Answer: A

Rationale: The correct answer is 'A: Everyone.' In the sentence, the verb 'has' must agree with the singular subject 'Everyone.' 'I,' 'day,' and 'boss' are not the subjects that the verb 'has' must agree with. 'I' is the object pronoun, 'day' is the object of the preposition 'off,' and 'boss' is part of the second clause and not the subject that governs the verb agreement in the first clause.