Correct Answer: A

Rationale: The correct answer is 'questionnaire.' A questionnaire is a set of questions used for gathering information. The incorrect choices B, C, and D have misspellings of the word 'questionnaire.' 'Questionaire,' 'questionnare,' and 'questionairre' are not correct spellings and may lead to confusion or misunderstanding. It is essential to use the correct spelling to ensure clear communication in healthcare settings.

Correct Answer: C

Rationale: The sentence discusses evidence and clinical trials related to a specific therapy, indicating a scientific context. Scientific journal articles are known for presenting research findings, discussing evidence, and proposing further studies, making them the most suitable source for this type of information. Choices A, B, and D are incorrect because a motivational speech is more focused on inspiring and encouraging, a business memo typically deals with internal communication in organizations, and a personal blog reflects individual opinions or experiences, none of which align with the content and tone of the sentence provided.

Correct Answer: B

Rationale: The correct answer is B: 'It's a beautiful day outside.' 'It's' is the contraction for 'it is.' Choice A is incorrect as it should be 'It's' instead of 'Its.' Choice C is incorrect as the apostrophe should come before the 's' in the contraction. Choice D is incorrect as the use of 'is'' is grammatically incorrect.

Correct Answer: B

Rationale: 'Aisle' is the correct answer. A homophone is a word that is pronounced the same as another word but has a different meaning or spelling. In this sentence, 'I'll' is a homophone of 'aisle' as they sound the same but have distinct definitions and spellings. Choices A, C, and D do not fit the criteria of being homophones of 'I'll'.

Correct Answer: C

Rationale: The informal tone and casual language, such as 'hey wait' and 'what are you up to tonight, anyways?' suggest that the speaker is a friend inquiring about the plans of another friend. This type of conversation is typical among peers and not in a professional setting, ruling out choices A and D. Choice B is incorrect because there is no indication of a debate or formal speech practice in the conversation.