Correct Answer: A

Rationale: Option A uses the correlative conjunction 'either/or' correctly by presenting two exclusive options. The structure 'either...or' is used to show a choice between two alternatives, and in this sentence, it clearly presents the options of coming to the party or staying home. Choice B incorrectly separates the options with a comma after 'either,' disrupting the correlative conjunction pair. Choice C uses 'whether' instead of 'either/or,' which changes the meaning and structure. Choice D uses 'either' incorrectly, as it should be followed by 'or' to form the correlative pair.

Correct Answer: B

Rationale: The clause 'While the rain poured' is a subordinate clause because it cannot stand alone as a complete sentence and provides additional information about the main action 'they huddled inside'. Subordinate clauses typically begin with subordinating conjunctions like 'while', 'because', 'if', etc. They rely on the main clause for context and meaning. In this sentence, the main action is 'they huddled inside,' making 'While the rain poured' a subordinate clause. The other choices are incorrect: An appositive clause renames or explains a noun, a noun clause functions as a noun within a sentence, and a main clause can stand alone as a complete sentence.

Correct Answer: C

Rationale: Option C correctly uses the phrase 'by the way' to introduce additional information that is not directly related to the previous sentence, making it a natural and appropriate use of the phrase in casual conversation. Choices A, B, and D do not use 'by the way' in the same context as option C. Choice A incorrectly uses 'by the way' to convey winning the lottery, which is not a casual or incidental piece of information. Choice B incorrectly uses 'by the way' after a semicolon in a way that disrupts the flow of the sentence. Choice D correctly uses 'by the way' but the information provided about the movie starting time is not a casual or incidental addition, unlike in option C.

Correct Answer: B

Rationale: To effectively adapt your writing style to different audiences, it is essential to consider factors such as the audience's age, background, and level of knowledge. Adapting vocabulary, tone, and level of detail to match the audience's needs enhances communication and ensures better understanding. Choice A is incorrect because using the same formal tone for all audiences may not be suitable or engaging for different groups. Choice C is incorrect as relying solely on jargon and technical terms may alienate those who are not familiar with such language. Choice D is incorrect because focusing solely on your own voice and writing preferences may not effectively communicate your message to diverse audiences who may have different preferences and needs.

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.