Select the word that makes the following sentence grammatically correct: 'Tracey wore her hair in a French braid, ____ was the style at the time.'

Correct Answer: D

Rationale: The correct answer is 'which' as it correctly introduces a defining clause describing the style of hair Tracey wore. 'Which' is used to provide additional information about the noun 'French braid' and helps specify the particular style among others. 'Among' (choice A) is incorrect as it is used to show a relation of one thing to many others. 'It' (choice B) is incorrect as it does not serve as a relative pronoun to introduce a clause. 'That' (choice C) is incorrect as it is not the most suitable relative pronoun to introduce a non-restrictive clause in this context.

Correct Answer: A

Rationale: The correct answer is 'dog, who had.' The phrase 'dog, who had' correctly indicates that Janet called her dog to run after a squirrel. In this case, 'who had' provides additional information about the dog, making the sentence grammatically accurate. Choices B, C, and D are incorrect because they do not use the appropriate relative pronoun 'who' for referring to animals.

Correct Answer: B

Rationale: The correct word to fill in the blank is 'break.' In this context, 'break' refers to a pause or rest, which is what Dr. Capra needed after completing the intense surgery. 'Brake' (choice A) refers to a device used to slow or stop a vehicle. 'Brink' (choice C) means the edge or verge of something. 'Broke' (choice D) is the past tense of 'break' and is grammatically incorrect in this sentence.

Correct Answer: D

Rationale: The correct answer is 'Our.' In this sentence, the possessive pronoun 'Our' is needed to show ownership and make the sentence grammatically correct. 'Screaming our took the shopkeeper by surprise' indicates that the shopkeeper was surprised by the screaming of a group or individuals related to 'our.' Choices A, B, and C are incorrect as they are pronouns referring to people ('We', 'They', 'Them'), not possessive pronouns that indicate ownership.

Correct Answer: D

Rationale: The sentence is in the past tense, indicating that the action occurred before the present moment. 'Began' is the correct past tense form of the verb 'begin' in this context. It shows that Stan started reviewing his class notes in the past. Choice A ('begins') is incorrect as it represents present tense. Choice B ('begun') is incorrect as it is the past participle form and does not fit the sentence structure. Choice C ('begin') is incorrect as it is the base form of the verb and not appropriate for the past tense context of the sentence.