Correct Answer: B

Rationale: The correct answer is 'Immigrating' because it refers to people coming to live permanently in a foreign country. 'Emigrating' (Choice A) means leaving one's own country to settle permanently in another, which does not fit the context of people coming into the United States. 'Migrating' (Choice C) is a general term for moving from one place to another without emphasizing the aspect of settling in a new country. 'Emigrated' (Choice D) is the past tense of emigrate and does not convey the ongoing action of people moving to the United States.

Correct Answer: D

Rationale: The original sentence is incorrect due to awkward phrasing. Choice D, 'This door will remain unlocked when the business is open,' provides a clear and concise correction, specifying that the door should be unlocked only when the business is open. Choices A and B do not address the timing aspect of unlocking the door, making them incorrect. Choice C is incorrect as the original sentence needs a revision to clarify the intended meaning.

Correct Answer: A

Rationale: The correct answer is 'A: Breathe.' When a child has a stuffy nose, the difficulty they experience is related to the action of breathing. 'Breathing' (choice B) is a gerund and doesn't fit the context of the question. 'Breath' (choice C) is a noun, not the correct verb form. 'Breadth' (choice D) refers to the extent or width of something and is unrelated to the child's difficulty due to a stuffy nose.

Correct Answer: A

Rationale: The correct answer is A: 'Plethora.' In the context provided, 'cornucopia' is used metaphorically to signify an abundance or a large variety of stimulating questions and conversation. 'Plethora' is a synonym for 'cornucopia' and means an excessive amount or abundance. Choices B, C, and D are incorrect. 'Ostracism' means exclusion or rejection, 'Laborious' means requiring a lot of effort, and 'Pensive' means engaged in deep thought.

Correct Answer: A

Rationale: The correct answer is 'A: She.' In this sentence, 'She' is the correct pronoun to use as the subject since it refers to Nurse Junko, who is one of the individuals performing the action. 'Them' (choice B), 'Me' (choice C), and 'Him' (choice D) are incorrect as they do not match the subject of the sentence, which is Nurse Junko.