Select the word or phrase that makes the following sentence grammatically correct: I was extremely surprised ___________ of her dismissal from the staff.

Correct Answer: B

Rationale: The correct phrase to use with 'surprised' in this sentence is 'to learn.' In this context, 'to learn' functions as an infinitive to indicate the purpose or reason for the surprise. 'Learning' (Choice A) is incorrect as it doesn't serve as an infinitive in this sentence. 'Of learning' (Choice C) is incorrect as it doesn't provide the correct structure needed in the sentence. 'Have learned' (Choice D) is incorrect because the verb tense does not match the context of the sentence.

Correct Answer: D

Rationale: The correct answer is 'D: broken.' In this sentence, the word 'broken' is the past participle form of the verb 'break' and is needed to complete the present perfect tense. The correct sentence should be 'The girls have apparently broken curfew at least twice this week.' Choices A, B, and C do not fit grammatically in the sentence because 'broke' is the simple past tense, 'break' is the base form, and 'breaking' is the present participle, whereas the sentence requires the past participle 'broken' for the present perfect tense.

Correct Answer: A

Rationale: In this sentence, the word 'flock' is singular, so the pronoun that follows should also be singular. Therefore, the correct choice is 'its,' which refers back to the singular noun 'flock.' Choice B ('their') is incorrect because it is a plural pronoun and does not agree in number with the singular noun 'flock.' Choices C ('it's') and D ('they're') are both incorrect contractions that do not fit grammatically in this context.

Correct Answer: B

Rationale: In the sentence, "The staff sergeant and I reviewed the enlisted men's records," the pronoun "I" refers to the subject of the sentence, which is the speaker. When combining the staff sergeant and the speaker "I," the correct pronoun to use is "we," which is the plural form of "I." Therefore, the word "We" is best to substitute for the underlined words in the sentence. Choice A, "Us," is incorrect as it is an object pronoun and does not match the subject position in the sentence. Choice C, "They," is also incorrect as it refers to a third-party group, not including the speaker and the staff sergeant. Choice D, "He," is incorrect as it does not include both the staff sergeant and the speaker in the pronoun substitution.

Correct Answer: C

Rationale: In the context of the sentence, the word 'then' is used incorrectly. The correct word that should be used is 'than,' which is used to make comparisons. The sentence should read, 'Nothing can be more delightful than a late-night swim in the reservoir.' The other choices 'Nothing,' 'delightful,' and 'reservoir' are spelled correctly and are contextually appropriate in the sentence.