Correct Answer: D

Rationale: The term 'posterior' refers to the back of the body. Therefore, the correct answer is 'Back.' Choices A, B, and C are incorrect. 'Topmost' and 'Lowermost' do not specifically refer to the back of the body, and 'Front' is the opposite of 'Back.'

Correct Answer: D

Rationale: The correct answer is 'Having.' In the sentence 'I am looking forward to having my birthday party next week,' 'having' is the correct present participle form of the verb 'have' to indicate an anticipated event. Choice A 'Going' is incorrect as it does not match the structure of the sentence. Choice B 'Go' is incorrect as it is the base form of the verb and does not fit grammatically. Choice C 'Have' is incorrect as it is the base form and does not convey the future action in the sentence.

Correct Answer: A

Rationale: The correct answer is A: 'Measures contributing to cleanliness.' In the given sentence, 'hygiene' refers to practices that promote cleanliness and health, such as washing hands, taking showers, and maintaining a clean environment. Choice B, 'Financial resources,' is incorrect as hygiene does not pertain to money matters. Choice C, 'Insurance,' is unrelated to the concept of hygiene. Choice D, 'Friendliness,' is also incorrect as it does not align with the context of personal cleanliness and health.

Correct Answer: A

Rationale: The correct answer is A: 'stealthy.' 'Insidious' is often used to describe something that proceeds in a gradual, subtle, but harmful way. It is not directly or openly harmful like 'deadly,' nor does it mean 'collapsed' or 'new.' Therefore, 'stealthy' best captures the meaning of 'insidious.'

Correct Answer: C

Rationale: The correct answer is 'C: Threw.' In this sentence, we need the past tense form of the verb 'throw' to show the action that occurred. Therefore, 'threw' is the correct choice. 'Thorough' (choice A) means complete or exhaustive, which doesn't fit the context of the sentence. 'Through' (choice B) is a preposition or an adverb, not the correct verb form. 'Throwing' (choice D) is the present participle form and does not match the past tense needed in the sentence.