Correct Answer: B

Rationale: In academic writing, transition sentences are used to connect ideas within a paragraph. Phrases like 'In the same way,' 'Another reason for this is,' and 'As a result' are commonly used to transition between different points. However, 'Research proves that' is more indicative of a factual statement rather than a transitional phrase. It presents information rather than smoothly transitioning between ideas, making it the correct choice as it does not fit the typical structure and function of a transition sentence.

Correct Answer: C

Rationale: The prefix 'circum-' means 'around,' which is the definition most related to 'circumference.' Circumference refers to the boundary that surrounds a circular shape. Choice A, 'Beyond,' is incorrect as it implies going further or exceeding a boundary. Choice B, 'After,' is not related to the concept of surrounding or encircling. Choice D, 'Before,' is also unrelated and denotes something occurring prior to a specific time or event.

Correct Answer: B

Rationale: In academic writing, transition sentences are used to connect ideas within a paragraph. Phrases like 'In the same way,' 'Another reason for this is,' and 'As a result' are commonly used to transition between different points. However, 'Research proves that' is more indicative of a factual statement rather than a transitional phrase. It presents information rather than smoothly transitioning between ideas, making it the correct choice as it does not fit the typical structure and function of a transition sentence.

Correct Answer: D

Rationale: The correct answer is 'D: Rare.' In the sentence, it is mentioned that 'a hundred years ago, automobiles were rare,' which provides the context that the opposite of rare would mean something very common, thus helping to decipher the meaning of 'ubiquitous.' Choice A, 'Ago,' refers to a time frame and doesn't directly provide a contrast to 'ubiquitous.' Choice B, 'Cars,' is mentioned in both parts of the sentence and does not help in defining 'ubiquitous.' Choice C, 'Now,' signifies the current time but doesn't contrast with 'ubiquitous' to aid in its understanding.

Correct Answer: C

Rationale: The correct chronological order for the sentences within a paragraph should follow the sequence of events logically. In this case, 'I, II, III, IV' is the correct order. Sentence I usually sets the stage or introduces the main idea, followed by sentence II, which provides additional information. Sentence III usually presents the climax or a turning point, leading to sentence IV, which wraps up the paragraph. Choice C, 'I, II, III, IV,' maintains this logical progression, making it the best chronological order. Choices A, B, and D do not follow a coherent chronological sequence and disrupt the flow of events within the paragraph.