Correct Answer: D

Rationale: The correct conjunction is 'Although.' In this sentence, there is a contrast being made between the difficulty of the class and Allison's success, indicating that despite the class being difficult, she excelled. 'If' implies a condition, 'Since' indicates a reason, and 'Because' shows causation, which do not fit the context of the sentence where a contrast is being expressed.

Correct Answer: A

Rationale: The term 'monochromatic' refers to something that has only one color. Choice A, 'having one color,' is the correct description for monochromatic. Choices B, C, and D are incorrect as 'monochromatic' does not mean 'having many parts,' 'having a lot of time,' or 'having too much heat.' Monochromatic specifically conveys the idea of consisting of or using only one color, making Choice A the correct answer.

Correct Answer: D

Rationale: In the sentence 'I asked a colleague to bring it to you,' the pronoun 'whose' does not fit grammatically. The pronoun 'whose' is used to indicate possession or belonging to someone, which is not relevant in this context. The other pronouns 'my,' 'our,' and 'your' are all appropriate to use in this sentence based on the context of the sentence. Therefore, 'whose' is the correct answer as it does not work in the given sentence.

Correct Answer: A

Rationale: The correct answer is 'A: Everyone.' In the sentence, the verb 'has' must agree with the singular subject 'Everyone.' 'I,' 'day,' and 'boss' are not the subjects that the verb 'has' must agree with. 'I' is the object pronoun, 'day' is the object of the preposition 'off,' and 'boss' is part of the second clause and not the subject that governs the verb agreement in the first clause.

Correct Answer: D

Rationale: The correct answer is D (Henry) because the adjectives 'strong and healthy' describe 'Henry.' In this sentence, 'Henry' is the subject being described as strong and healthy, not 'weeks,' 'his,' or 'surgery.' While 'weeks' and 'surgery' are nouns mentioned in the sentence, they are not the nouns being described by the adjectives in question. 'His' is a possessive pronoun referring to Henry and does not match the criteria of being directly described by the adjectives 'strong and healthy.' Therefore, 'Henry' is the noun that the adjectives specifically describe in this context.