Correct Answer: D

Rationale: The correct answer is D: 'effect; than.' In this sentence, 'effect' is the appropriate word to use as it signifies the result of increasing bus fares on ridership. Additionally, 'than' is the correct word for making a comparison. Choice A and B are incorrect as 'affect' is a verb, while 'effect' is the noun needed in this sentence. Choice C is incorrect as 'then' is used to indicate time or sequence, which is not suitable in this context.

Correct Answer: D

Rationale: The transitional phrase 'As it turns out' adds a reflective tone that matches the surprise at how well the RV worked for the family. Choice A ('NO CHANGE') does not introduce any new information or transition. Choice B ('Not surprisingly, the RV') contradicts the surprise factor mentioned in the sentence. Choice C ('Furthermore, the RV') does not provide a suitable transition given the context of the sentence.

Correct Answer: B

Rationale: The correct answer is B: 'we would wake up, eat breakfast, and break camp.' The original sentence is a list of actions in the past, so the verb 'break' should also be in the past tense to maintain consistency. Choice A is incorrect because 'broke' is incorrect in this context. Choice C is a question format and does not fit the original sentence structure. Choice D changes the tense to present progressive, which does not match the past tense context of the sentence.

Correct Answer: C

Rationale: When addressing a formal letter to the school board, 'Dear Sir and/or Ma'am' is the most appropriate greeting as it shows respect and professionalism. Choice A, 'Dearest School Board,' is too informal and overly personal for a professional communication. Choice B, 'To Whom It May Concern,' is more suitable for general inquiries when the recipient is unknown, not for addressing a specific group like a school board. Choice D, 'Hello all,' is too casual and lacks the formality required when addressing a school board.

Correct Answer: B

Rationale: The correct answer is B because 'aural' and 'oral' are homophones, but they have different meanings. 'Aural' refers to hearing, while 'oral' refers to the mouth or spoken words. In the context of treating mouth ulcers, the correct term should be 'oral paste.' Choices A, C, and D do not contain homophone errors. In choice A, 'heard' is correctly used in the context of listening. Choice C is grammatically correct and does not involve homophones. Choice D correctly uses 'effect' and does not involve homophones.