The mailperson's job is to put the __________ in every mailbox on the block.

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 'Was elected' as it is the passive voice construction needed in this context. The sentence is referring to an action that happened to John F. Kennedy (being elected president), so the passive voice 'was elected' is the appropriate form to use in this sentence. Choice A, 'Elected,' is incorrect because it is the active voice and does not fit the sentence structure. Choice B, 'Was electing,' is incorrect as it is the continuous form of the verb, which is not suitable in this sentence. Choice D, 'Had elected,' is incorrect because it implies a past perfect tense which is not required in this context.

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: 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 'Ask' because it maintains subject-verb agreement with 'two students,' requiring a plural verb 'ask' to match the plural subject. The other choices ('Is,' 'Was,' 'Could') do not agree with the plural subject and are thus incorrect. 'Is' is singular, 'Was' is the past tense form, and 'Could' indicates a possibility but does not fit the context of the sentence.

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: C

Rationale: In this sentence, the correct reflexive pronoun is 'myself' as it reflects the action back onto the subject. 'I want to do it myself' means the child wants to do something on their own without assistance from others. Choice A 'Mine' is a possessive pronoun and doesn't fit in the context of the sentence. Choice B 'Me' is an object pronoun and doesn't show the action reflecting back on the subject. Choice D 'Me self' is not a correct form of a reflexive pronoun in English.

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: The correct answer is 'Play' because 'Children' is a plural subject and requires the base form of the verb. When referring to a plural subject like 'Children,' the verb should be in its base form without an added 's' or 'ed.' In this context, 'Play' is the appropriate form to use to match the subject 'Children.' Choice B, 'Plays,' is incorrect because it is the singular form of the verb and does not agree with the plural subject 'Children.' Choice C, 'Played,' is incorrect as it is the past tense form of the verb and does not fit the present tense context of the sentence. Choice D, 'Playing,' is incorrect as it is the present participle form of the verb and does not match the simple present tense needed in the sentence.