Correct Answer: C

Rationale: The correct plural form of 'syllabus' is 'syllabi.' In English, when a word ends in -us, the plural form is often changed to -i. Therefore, 'Syllabi' is the correct plural form. Choice A, 'Syllabus,' is the singular form, not the plural. Choice B, 'Syllaba,' does not follow the standard pluralization rule for words ending in -us. Choice D, 'Syllabis,' is an incorrect plural form that does not follow the standard English pluralization rules.

Correct Answer: A

Rationale: The correct answer is A: "I'm counting on you to finish this before the deadline." This sentence is classified as informal language due to the use of contractions (I'm) and the casual tone of the phrase. The other choices (B, C, D) are more formal in nature. Choice B uses formal language with terms like 'non-negotiable.' Choice C is a general statement about meeting a deadline without any informal language, and choice D discusses the significance of the time period before a deadline in a formal manner.

Correct Answer: D

Rationale: The correct answer is D: 'Many.' The prefix poly- comes from the Greek word 'polus,' which means 'many.' Therefore, in the word polygon, poly- indicates a shape with many sides. Choices A, B, and C are incorrect because the prefix poly- does not mean 'few,' 'several,' or 'none,' but rather 'many.'

Correct Answer: C

Rationale: The correct answer, option C, effectively clarifies the communication structure by specifying who is communicating with whom and when. Tanya instructs her sister to convey a message to her boyfriend Joe, requesting him to call Tanya upon his arrival home. This revision removes the ambiguity present in the original sentence. Option A is incorrect as it introduces unnecessary complexity and alters the original meaning. Option B is incorrect as it misinterprets the relationships among the individuals involved. Option D is incorrect as it changes the dynamics of the communication and does not address the ambiguity in the original sentence.

Correct Answer: A

Rationale: The correct answer is A. Javier has already outlined his paper, written a draft, and revised it. Brainstorming topics typically occurs at the initial stages of the writing process to generate ideas and develop a focus. Since Javier has already completed a draft, the brainstorming step has not been done. Choices B, C, and D are incorrect because Javier has already conducted research, written a draft, and selected a topic for his essay.