Correct Answer: A

Rationale: Option A, 'I have been working on this project since morning,' uses the present perfect continuous tense correctly. This structure implies an action that started in the past (working on the project) and is still ongoing up to the present moment. Choice B is incorrect as it uses the present perfect tense ('has finished'), which indicates a completed action with relevance to the present. Choice C uses the future continuous tense ('will be leaving'), and Choice D uses the past perfect continuous tense ('had been living'). Therefore, only Choice A fits the criteria for the present perfect continuous tense.

Correct Answer: A

Rationale: Choice A uses the subjunctive mood correctly as it expresses a wish or hypothetical situation. The phrase 'I wish I could have gone to the beach' implies a desire to have done something in the past that did not happen, which aligns with the usage of the subjunctive mood. Choice B uses the past subjunctive 'were' correctly in the conditional statement 'If I were you,' which is a common usage as well. Choice C, 'He insisted that she stay home,' is also correct as it follows the rule that the base form of the verb is used after verbs like insist, demand, request, etc., in the subjunctive mood. Choice D, 'Although it was raining, we decided to go for a walk,' does not use the subjunctive mood. It is a complex sentence with a subordinate clause but lacks the specific mood required to fit the context.

Correct Answer: B

Rationale: The correct answer is 'B: Us.' In the sentence, 'Jessica invited Sarah and me to the party,' 'Sarah and me' serve as the object of the verb 'invited.' Therefore, the pronoun 'us' is the correct choice to replace 'Sarah and me' as the object pronoun. Choice A, 'We,' is a subject pronoun and does not fit in this context. Choice C, 'Ours,' is a possessive pronoun and is not appropriate for replacing the object pronoun 'Sarah and me.' Choice D, 'Myself,' is a reflexive pronoun, which is not suitable for this sentence where an object pronoun is needed.

Correct Answer: B

Rationale: In writing style, 'voice' refers to the author's unique perspective, personality, tone, and overall approach to crafting the written message. It reflects the individuality of the writer and how they express themselves through their writing. Choice A is incorrect as 'voice' is not related to the font and typeface but to the author's expression. Choice C is incorrect as 'voice' is beyond just grammar and punctuation rules. Choice D is incorrect as 'voice' is more about the author's style of expression rather than the intended audience and purpose of the writing.

Correct Answer: D

Rationale: The correct answer is D because it uses a question mark within the quoted material as it is a direct question. In this case, the sentence is a reported question, so it does not need additional punctuation within the reported speech. Choice A is incorrect as it incorrectly adds a comma before 'if.' Choice B is incorrect because a colon is not appropriate before 'if' in this context. Choice C is incorrect as it adds an unnecessary comma after 'wanted.'