Select the word that makes the following sentence grammatically correct. Having ___________ one pill at bedtime, the patient was able to sleep for eight hours.

Correct Answer: C

Rationale: The correct word to use in this sentence is 'taking' to show the continuous aspect of the action. The sentence should read: 'Having taking one pill at bedtime, the patient was able to sleep for eight hours.' 'Taking' is the present participle form of the verb 'take,' which is appropriate in this context to indicate the ongoing action of taking a pill at bedtime. Choice A, 'took,' is incorrect as it is the simple past tense, not suitable for this sentence's structure. Choice B, 'take,' is the base form of the verb, which does not fit the sentence's requirement for a participle. Choice D, 'taken,' is the past participle form, which is also unsuitable for showing the ongoing action required in this context.

Correct Answer: A

Rationale: The correct word to use in this sentence is 'volunteered' as it indicates an action that Cathy did in the past. The sentence suggests that Cathy was engaging in volunteering at the hospital for the first time, so the past tense form 'volunteered' is the most appropriate choice. Choice B ('volunteering') is incorrect because it is the present participle form and does not fit the past tense context of the sentence. Choice C ('was volunteered') is passive voice and implies that someone else made Cathy volunteer, which is not the intended meaning. Choice D ('volunteer') is incorrect as it is the base form of the verb and does not match the past tense requirement of the sentence.

Correct Answer: D

Rationale: The word 'although' is the best fit in the sentence because it indicates a contrast between the fact that the emergency room was not busy last night and the head nurse's decision not to let anyone end her shift early. 'Although' sets up a contrast by acknowledging the first part of the sentence while introducing the surprising or unexpected information that follows. Choices A, B, and C do not provide the appropriate contrast needed in this context. 'Because' implies causation, 'Provided that' implies a condition for something to happen, and 'As if' implies a comparison rather than a contrast.

Correct Answer: C

Rationale: The correct answer is C. The sentence requires an infinitive form of the verb 'to conduct' after the verb 'promised.' This structure is commonly used in English grammar, where the main verb 'promised' is followed by an infinitive verb form. Therefore, the sentence should read: 'The students promised to conduct themselves with quiet dignity.' Choice A ('conduct') is incorrect as it is not in the infinitive form required after 'promised.' Choice B ('conducting') is incorrect as a gerund does not fit the grammatical structure of the sentence. Choice D ('to be conducted') is incorrect as it changes the meaning of the sentence, suggesting that someone else will conduct the students, rather than the students conducting themselves.

Correct Answer: A

Rationale: In this context, 'principle' is spelled incorrectly. The correct word should be 'principal,' which means main or primary. 'Principle' refers to a fundamental truth or belief. Choice B, 'role,' is correctly spelled. Choice C, 'provision,' is also spelled correctly. Choice D, 'convenient,' is spelled correctly as well. Therefore, the correct answer is A as it is the only word spelled incorrectly in the context of the sentence.

Correct Answer: C

Rationale: The word 'therapist' in the sentence is used correctly. However, the word 'councilor' is misspelled and should be 'counselor' to refer to a mental health professional providing therapy services. The correct term should have an 's' after 'counselor,' making it 'counselor' instead of 'councilor.' Therefore, the word 'councilor' is the one not used correctly in the sentence.

Correct Answer: C

Rationale: The correct answer is 'C: herself.' In this sentence, 'herself' is the reflexive pronoun that correctly refers back to Mary Ann. It shows that Mary Ann is giving credit to herself for studying hard and passing the test. The use of 'oneself' (choice A) would be incorrect here as it is too general and does not specify Mary Ann. Choices B and D ('itself' and 'themselves') are also incorrect because they do not match the singular subject 'Mary Ann.' Therefore, 'herself' is the only option that fits both grammatically and contextually in this sentence.

Correct Answer: A

Rationale: The correct answer is 'and.' The sentence requires a conjunction that shows the need for both a thorough cleaning and washing the windows. The word 'and' is used to connect two actions that must be performed, indicating a list of tasks that should be completed in the lounge. Choices B, C, and D are incorrect because 'or' would imply a choice between cleaning and washing the windows, 'but' would suggest a contrast or contradiction between cleaning and washing the windows, and 'yet' is used to show a contrast or unexpected result, which is not suitable in this context where both actions are necessary.

Correct Answer: B

Rationale: The correct word to use in this sentence is 'has' because 'One of the students' is singular, so it should be followed by a singular verb. The word 'has' is the correct singular form of the verb in this context. Choice A 'have' is plural, Choice C 'are' is also plural, and Choice D 'is' does not agree in number with the subject 'students'. Therefore, 'has' is the only correct choice here.