Correct Answer: C

Rationale: The underlined phrase 'with a mischievous grin' functions as an adverbial phrase in the sentence. It modifies the verb 'approached' by providing information on how he approached her, describing his manner. Adverbial phrases typically answer questions like 'how,' 'when,' 'where,' 'why,' or 'to what extent,' which this phrase does by indicating the manner in which he approached. Choices A, B, and D are incorrect. The phrase does not serve as a subject (A), direct object (B), or appositive phrase (D) in the sentence. Instead, it functions to provide additional information about the action of approaching, making it an adverbial phrase.

Correct Answer: B

Rationale: The correct answer is B: 'To bite off more than one can chew' means to take on more than one can handle or to undertake a task exceeding one's capabilities. This idiom warns against overcommitting oneself and facing difficulties in managing the workload effectively. Choice A, 'To be overly confident,' is incorrect as the idiom implies a situation of overestimating one's capacity rather than confidence. Choice C, 'To be easily discouraged,' is not related to the idiom's meaning, which focuses on task difficulty rather than emotional response. Choice D, 'To be meticulous in planning,' is not accurate as the idiom refers to the execution of tasks rather than the planning phase.

Correct Answer: C

Rationale: The correct answer is C. The word 'circumstance' is misspelled in the given choices. 'Accommodate,' 'acquiesce,' and 'indelible' are spelled correctly. It is important to pay attention to the spelling of words to ensure clear and accurate communication. 'Circumstance' is a common word, but in this context, it is intentionally misspelled to test your attention to detail.

Correct Answer: C

Rationale: The correct answer is 'effected.' In this context, 'effected' means to produce a result or impression, which aligns with the emotional impact of the strangers' kindness. The other choices are incorrect: A) 'affected' might seem plausible, but 'effected' is a better fit as it implies a direct result. B) 'infected' is incorrect as it implies a negative or harmful impact, which is not the intended meaning. D) 'defected' means to abandon allegiance, which is not relevant in the given sentence.

Correct Answer: B

Rationale: The correct answer is option B, 'I will have finished'. This choice correctly expresses a future event (finishing the project) that will be completed before another future point in time (next week). The future perfect tense 'will have finished' is used to show an action that will be completed before a specified future time. Choice A, 'I will be finishing', is incorrect as it indicates an ongoing action that will still be in progress by next week, which is not the intended meaning. Choice C, 'I am finishing', is incorrect as it indicates a present action that is ongoing, not a future event. Choice D, 'I would finish', is incorrect as 'would' is used for hypothetical situations or polite requests, which is not suitable in this context of a future project completion.