Economics ____________ my least favorite subject at school.

Correct Answer: B

Rationale: In this sentence, 'Economics' is a singular subject, so it should be paired with a singular verb. 'Is' is the correct verb to use with a singular subject like 'Economics.' Therefore, the correct sentence is: 'Economics is my least favorite subject at school.' Choice A 'Am' is incorrect because it is a first-person singular form of the verb 'to be' and does not agree with the subject 'Economics.' Choice C 'Are' is incorrect as it is a plural verb form and does not match the singular subject 'Economics.' Choice D 'Been' is incorrect as it is a past participle and cannot be used as the main verb in this sentence structure.

Correct Answer: A

Rationale: In this context, 'Envelopes' is the correct choice as it refers to the items (envelopes) that the mailperson is responsible for delivering. The other choices are incorrect: 'Mail' (Choice B) is too general and does not specify the items to be delivered, 'Block' (Choice C) is the location and does not make sense in the context of delivering mail, and 'Every' (Choice D) is an adjective that does not complete the sentence logically.

Correct Answer: C

Rationale: The correct answer is 'C: Had known.' In this sentence, the structure is a third conditional, which is used for unreal situations in the past. 'Had known' is the correct past perfect form that matches the conditional structure. It indicates that if they had possessed the knowledge about the bad weather in advance, they wouldn't have gone to the beach. Options A, B, and D do not correctly fit the past perfect tense required in this context. 'Know' (Option A) is present tense, 'Knew' (Option B) is simple past tense, and 'Were knowing' (Option D) is incorrect and does not convey the intended meaning of the sentence in the context of a third conditional.

Correct Answer: A

Rationale: The correct answer is 'Massive' as it accurately describes the size of the stage in relation to the performance. The word choice 'Massive' complements the context of a theater performance, highlighting the grandeur and scale of the stage. The other choices, 'Stunningly,' 'Lonely,' and 'Misery,' do not fit logically in the sentence as they do not relate to the physical attributes of the stage.

Correct Answer: D

Rationale: The correct answer is 'Were broken.' In this sentence, the subject 'glass in three of the windows' is plural, so the correct verb form should also be plural, which is 'were broken.' The verb 'broken' in the original sentence is in the past participle form, which is used correctly in the corrected answer choice 'D.' Choices A, B, and C are incorrect because they do not match the subject in number ('glass in three of the windows') and do not use the correct past participle form of the verb.

Correct Answer: B

Rationale: In this sentence, the correct form is the gerund 'going' after the preposition 'to.' The gerund form is used after prepositions to indicate an action or state. Therefore, 'Going' is the correct choice to complete the sentence. Choice A ('Go') is incorrect because it is not the gerund form required after 'to.' Choice C ('Be going') is incorrect as it is not the standard form used in this context. Choice D ('Going to go') is redundant and unnecessarily wordy.

Correct Answer: A

Rationale: The correct answer is 'A: Has.' In this sentence, 'he' is singular, so the verb should also be singular. 'Has' is the correct form of the verb for the third-person singular subject 'he.' The verb 'have' is plural and does not agree with the singular subject. 'Might' and 'should' are modal verbs that do not fit the context of the sentence requiring a simple verb form.

Correct Answer: A

Rationale: In this sentence, 'Oneself' is the correct reflexive pronoun to use when referring back to the singular subject 'a person.' It is important to match the reflexive pronoun with the singular noun. 'Yourself' and 'Themselves' are plural forms and do not agree with the singular subject 'a person.' 'Itself' is used for inanimate objects, not for people. Therefore, 'Oneself' is the most suitable choice in this context.

Correct Answer: A

Rationale: The correct answer is A: 'As soon as the puppies were asleep' is the dependent clause in the sentence. It functions as an adverbial clause, indicating a time relationship with the action of the mother dog leaving her bed. Dependent clauses rely on independent clauses to form complete sentences and cannot stand alone. Choice B is incorrect because it separates the dependent clause. Choice C is incorrect as it is a noun phrase. Choice D is incorrect as it is an independent clause.