Correct Answer: A

Rationale: The correct answer is A: "It is primarily used to save energy during certain months." The passage clearly states that Daylight Savings Time was first put into practice by the German government in 1916 to save energy during the First World War. The US followed suit in 1918. This measure was unpopular initially, but the energy crisis in the 1970s led to making it a law. Choices B, C, and D are incorrect. Choice B is incorrect as the passage mentions that the British government initially refused the idea, and it was unpopular when first implemented. Choice C is incorrect as it was not the US but the British government that opposed the idea initially. Choice D is incorrect as Daylight Savings Time was not implemented to prevent jetlag, but rather to save energy and make better use of daylight hours.

Correct Answer: B

Rationale: Macmillan's invention of pedals was a significant milestone in bicycle history as it allowed for quicker and more efficient travel. The provided extract mentions that Macmillan's bicycle had foot-operated cranks like pedals, which enabled the rider to travel at a quick pace. This innovation marked a crucial development in the evolution of bicycles. While choices A, C, and D are related to advancements in bicycle design and safety, the key significance of Macmillan's invention lies in introducing pedals to bicycles, making choice B the correct answer.

Correct Answer: A

Rationale: The correct answer is A: 'The water cycle consists of precipitation, evaporation, and condensation.' The passage explains the stages of the water cycle, starting with precipitation (rain, snow, sleet, or hail) falling to the ground, followed by runoff, evaporation transforming liquid water into water vapor, and finally condensation turning water vapor back into liquid. Choice B is incorrect because it is too broad and doesn't specifically address the stages of the water cycle. Choice C is incorrect as rain is just one part of the water cycle and not the most important. Choice D is incorrect as evaporation is not the final step but one of the stages of the water cycle.

Correct Answer: A

Rationale: The correct answer is A: Developing good sleep habits and using herbs and spices. The passage highlights that sleep hygiene, which involves developing good sleep habits and non-pharmacological therapies like herbs and spices, are solutions to insomnia. These methods aim to promote better sleep quality. Choices B, C, and D are incorrect. Avoiding physical activity, staying awake for longer periods, and eating large meals before bed can actually worsen insomnia symptoms and disrupt sleep patterns.

Correct Answer: A

Rationale: The correct answer is A. The author wrote the passage to explain insomnia and suggest ways to deal with it. The passage provides information about insomnia, its impact on daily life, and offers solutions like sleep hygiene and non-pharmacological therapies. Choices B, C, and D are incorrect as the passage does not encourage avoiding sleep, criticize people with sleep problems, or promote the use of sleep medication. Instead, it focuses on understanding and addressing insomnia.