Correct Answer: C

Rationale: The author's tone in the passage is informal. The passage provides a narrative about Hedy Lamarr's life and inventions, offering insights into her challenges and achievements in a conversational manner. The use of phrases like 'To relieve this boredom' and 'Just think, we might not have any of those things' indicates a casual and engaging tone, suitable for storytelling. Choice A, 'Sarcastic,' is incorrect as there is no evident use of sarcasm or irony in the passage. Choice B, 'Formal,' is incorrect because the tone is not stiff or ceremonious; instead, it is relaxed and personal. Choice D, 'Scientific,' is also incorrect as the tone is not focused on presenting technical information or research findings but rather on sharing a personal story.

Correct Answer: A

Rationale: The correct answer is A: 'Witty.' The tone of the passage is light-hearted and humorous, characterized by amusing details like the eccentric birthday party with zebras, monster trucks, and a limited buffet of boiled asparagus and pickled carrots. The mention of Dr. Creekstone planning an even bigger party with more zebras adds to the whimsical and humorous tone. Choices B, C, and D are incorrect as there is no indication of disbelief, hostility, or anxiety in the passage; instead, it conveys a sense of fun and amusement.

Correct Answer: A

Rationale: The correct conclusion that can be drawn from the passage is that plastic pollution poses a significant environmental threat due to its lasting nature and difficulty in recycling. The passage highlights the challenges of recycling plastic due to its low quality when recycled, leading to pollution and environmental hazards. It mentions the presence of a large island of plastic in the Pacific Ocean, showing the severe impact of plastic pollution on the environment. Therefore, choice A is the most accurate conclusion. Choice B is incorrect as the passage mentions that plastic has many advantages despite its recycling challenges. Choice C is incorrect as the passage indicates that recycling plastic is difficult due to its low quality when recycled. Choice D is incorrect as the passage clearly states that plastic consumption by marine life like fish and birds is a reality, showing the impact of plastic pollution on marine ecosystems.

Correct Answer: C

Rationale: 'Erroneously' means incorrectly or mistakenly, which aligns with the context provided in the passage. Therefore, 'Incorrectly' and 'Mistakenly' are synonyms for 'erroneously.' 'Inconsequentially' means not resulting in any significant consequence, which is not synonymous with 'erroneously.' 'Extraneously' means irrelevant or unnecessary, which is also not a synonym for 'erroneously.'

Correct Answer: D

Rationale: The main idea conveyed in the extract is that Shia encounters a terrifying situation in the CFO's office. The passage describes Shia hearing strange noises, feeling fear, and encountering alarming events like crashes and howls. This builds tension and indicates a dangerous situation unfolding. Choices A, B, and C are incorrect as they do not capture the central theme of Shia facing a frightening encounter in the CFO's office.