Correct Answer: A

Rationale: The best summary of the passage is that humans can use coloration and markings on snakes to determine whether they're venomous. The passage discusses how snake markings serve the purpose of warning predators and helping humans identify venomous snakes by their bright coloration. Choice B is incorrect because the passage focuses on how coloration helps snakes evade predators rather than hide from them. Choice C is incorrect as it only mentions two specific snakes with similar markings, which is a minor detail compared to the main point of identifying venomous snakes. Choice D is incorrect because it only partially reflects the passage, focusing solely on the relationship between markings and venom in snakes, missing the crucial aspect of human ability to discern venomous snakes based on their coloration.

Correct Answer: A

Rationale: The purpose of the passage is to inform Mr. Morgan that he will likely not receive an offer for the job of Lead Technician due to the high number of applicants. The passage mentions the high volume of applications and the competitive nature of the selection process, indicating that Mr. Morgan may not be successful. Choice B is incorrect because the passage does not express gratitude to Mr. Morgan but rather informs him of the situation. Choice C is incorrect as there is no offer made in the passage. Choice D is incorrect as the passage does not specifically state that the review will take longer than expected, but rather that it will take longer than previously stated.

Correct Answer: B

Rationale: The correct sequence of the author's actions based on the extract is as follows: the author looked at the house on Forest Road first, then two houses that were too small, followed by a house with a yard that was too small, and finally a house that was too expensive. Therefore, choice B correctly lists the author's actions in the given sequence. Choice A is incorrect as it reverses the order of the second and third houses visited. Choice C is incorrect as it includes a house with only one bathroom, which was not mentioned in the extract. Choice D is incorrect as it places the house on Forest Road last, whereas it was actually the first house visited.

Correct Answer: B

Rationale: The correct answer is B. The passage explains that the kingsnake mimics the venomous coral snake's markings to deter predators, particularly hawks and eagles, which cannot differentiate between the two species. This implies that both the coral snake and the kingsnake face similar threats from predators in their shared habitat. Choice A is incorrect because the passage clearly states that the kingsnake is nonvenomous, so it is not dangerous to humans. Choice C is incorrect as the passage highlights that not all snakes with flashy markings are venomous, emphasizing the need for caution. Choice D is incorrect as there is no mention of the kingsnake changing its markings in response to the presence of hawks or eagles in the passage.

Correct Answer: C

Rationale: The statement 'It was irresponsible for Julia to leave work early' is an opinion because it reflects a judgment or evaluation of Julia's actions, rather than stating a fact. The other statements (A, B, D) provide factual information about events that occurred in the passage. Option A states a fact about Julia being asked by her boss; option B explains the reason for Julia being late; option D provides a reason for Julia feeling tired. These are not opinions but rather statements of events or circumstances.