Correct Answer: A

Rationale: The most dangerous part of building the Golden Gate Bridge, as mentioned in the passage, was keeping the road balanced to prevent it from collapsing. While constructing the towers and suspending the cables were challenging tasks, the passage specifically highlights the balancing of the bridge as the most treacherous aspect of the construction. Therefore, choice A is the correct answer. Choices B, C, and D are incorrect as they do not reflect the primary danger emphasized in the passage.

Correct Answer: A

Rationale: The correct answer is A: 'Physical illness can cause insomnia.' The passage mentions that chronic insomnia can result from a medical illness, among other conditions. This indicates a direct link between physical illness and insomnia. Choice B is incorrect as the passage does not mention exercise causing insomnia but actually suggests developing good sleep habits as a solution. Choice C is incorrect as the passage provides solutions to insomnia, such as sleep hygiene and non-pharmacological therapies. Choice D is incorrect as the passage emphasizes the importance of getting a good night's sleep for good health, implying that sleep is necessary.

Correct Answer: A

Rationale: The most dangerous part of building the Golden Gate Bridge, as mentioned in the passage, was keeping the road balanced to prevent it from collapsing. While constructing the towers and suspending the cables were challenging tasks, the passage specifically highlights the balancing of the bridge as the most treacherous aspect of the construction. Therefore, choice A is the correct answer. Choices B, C, and D are incorrect as they do not reflect the primary danger emphasized in the passage.

Correct Answer: C

Rationale: The correct answer is C: 'It is interesting to discover new ways to do things.' This statement draws a conclusion by summarizing the learning experience mentioned throughout the article. It reflects on the diversity of eating habits across cultures and the fascination in discovering and adapting to new methods of accomplishing tasks. Choice A is incorrect as it describes a fact rather than drawing a conclusion. Choice B is incorrect as it also presents a historical fact without concluding or summarizing any information. Choice D is incorrect because it states a fact about the challenges of space travel without offering a concluding remark or summarizing the topic.

Correct Answer: D

Rationale: The correct answer is D. The author highlights cultural diversity and the variety of eating habits in the article. The passage discusses the different eating methods developed by various cultures, such as cutlery in European cultures and chopsticks in China. It emphasizes the interest in discovering these cultural differences and learning new ways of doing things, showcasing the importance of diversity. Choices A, B, and C are incorrect as they do not align with the main focus of the article, which is cultural diversity and eating habits, rather than the author's opinion on chopsticks, space flight, or personal food preferences.