Correct Answer: A

Rationale: The spiracles in insects serve the crucial function of allowing them to breathe atmospheric air even when submerged. The passage explains that insects have a system of branching air-tubes that carry atmospheric air with oxygen to all tissues. The air enters these tubes through paired air-holes or spiracles, enabling insects to respire even when they are underwater. Choices B, C, and D are incorrect because the spiracles do not protect internal organs from water pressure, filter oxygen from water for underwater breathing, or expel carbon dioxide from the body. The primary role of spiracles is to facilitate respiration by allowing insects to access atmospheric air.

Correct Answer: C

Rationale: 'Moult' refers to the act of shedding the outer shell, which is part of the insect's development. In the passage, it mentions insects that remain continually under water until they are ready to undergo their final moult and attain the winged state. This process of shedding the outer shell is crucial for insects transitioning from their aquatic larval stage to their aerial adult stage. Choices A, B, and D do not align with the specific context provided in the passage about the term 'moult.'

Correct Answer: B

Rationale: The correct answer is B. In Wilde's play, 'The Importance of Being Earnest,' the characters' practice of leading double lives serves to reveal their hypocrisy and superficiality. This aligns with the central theme of the play, which satirizes the absurdities and trivialities of the British aristocracy. By showcasing the characters' dual nature through their double lives, the play effectively critiques the shallow social roles they inhabit. Choice A is incorrect because the concept of leading double lives does not necessarily show the characters' true personalities but rather their deceptive and hypocritical behaviors. Choice C is incorrect as while leading double lives may deepen the complexity of the characters, the primary focus is on exposing their hypocrisy and shallowness. Choice D is also incorrect as the concept of double lives does add layers of deception, but the key message lies in revealing the characters' superficiality and hypocrisy.

Correct Answer: C

Rationale: According to the extract, the term 'working man' refers to individuals who are actively employed and earn wages in a traditional sense. Charles Dickens emphasizes the importance of the working man having a share in the management of institutions designed for their benefit. This aligns with choice C, making it the correct answer. Choice A is incorrect as the extract does not mention anything about being well versed in the workings of the soul. Choice B is incorrect because the extract does not suggest that working men are not involved in social activities due to the physical demands of their work. Choice D is also incorrect as the extract does not focus on the historical transitions of the working man.

Correct Answer: D

Rationale: The correct answer is D. The speaker's final comment indicates a determination to keep looking for Hyde, as he expresses his intention to become 'Mr. Seek' if the other person is indeed 'Mr. Hyde.' This shows that the speaker is persistent in his search for Hyde, as he believes that discovering Hyde's identity could potentially unravel the mystery and clarify his friend's strange behavior. Choices A, B, and C are incorrect because the final comment does not imply a name change, an identity crisis, or a mistaken search but rather a firm decision to continue seeking out Hyde.