Correct Answer: A

Rationale: The given sentence combines multiple independent clauses without appropriate punctuation or conjunctions, creating a run-on sentence. A run-on sentence occurs when two or more independent clauses are joined without the necessary punctuation or coordination. In this case, the sentence lacks the proper conjunction or punctuation between 'store' and 'bought,' resulting in a run-on sentence. Choice B, 'Comma splice,' is incorrect because a comma splice involves joining two independent clauses with just a comma, which is not the case in the given sentence. Choice C, 'Dangling modifier,' is incorrect as there are no misplaced modifiers in the sentence. Choice D, 'Subject-verb agreement,' is also incorrect as the error in the sentence does not involve subject-verb agreement but rather the incorrect combination of independent clauses.

Correct Answer: B

Rationale: The correct answer is 'B: Through the park.' A participial phrase acts as an adjective and is formed from a verb. In this sentence, 'Running through the park' describes 'she' and functions as an adjective modifying the subject. Choice A 'Running' is incorrect because it is just the present participle without additional context to form a phrase. Choice C 'She spotted' is incorrect as it is a subject and a verb, not a participial phrase. Choice D 'A squirrel' is incorrect as it is a noun phrase, not a participial phrase.

Correct Answer: C

Rationale: In this sentence, 'important' is the positive form of the adjective. When comparing two things, the comparative form is used, which is 'more important' in this case. 'More important' indicates a higher degree of importance when comparing two things. Therefore, 'more important' is the correct comparative form of the adjective 'important' in this context. Choice A ('important') is the positive form, not the comparative form. Choice B ('importantly') is an adverb, not a comparative form of the adjective. Choice D ('most important') is the superlative form, used to show the highest degree of importance among three or more things, not for comparing two things.

Correct Answer: A

Rationale: Option A correctly uses the past perfect tense to show an action that was completed before another past action. In this sentence, 'the party had already begun' indicates that the party started before 'I arrived.' This structure is typical of the past perfect tense. Choice B uses the past perfect tense but does not demonstrate the sequence of actions in the past. Choice C uses the future perfect tense, indicating completion of an action by a future time. Choice D uses the past perfect continuous tense, not the simple past perfect tense required by the question.

Correct Answer: C

Rationale: In the sentence 'I was disappointed by the outcome,' 'disappointed' is used to describe the subject 'I,' indicating its quality. This function classifies 'disappointed' as an adjective. Adjectives modify nouns or pronouns by giving more information about their attributes. Therefore, the correct answer is 'Adjective.' The other choices are incorrect because: - 'Verb' refers to an action word or a state of being, which 'disappointed' is not performing in this sentence. - 'Noun' represents a person, place, thing, or idea, and 'disappointed' does not serve this function in the given sentence. - 'Adverb' modifies verbs, adjectives, or other adverbs, but 'disappointed' is not modifying any of these in the sentence provided.