Correct Answer: B

Rationale: Option B, 'When I was seven, my mother moved me to a new school,' is the clearest sentence as it directly and clearly states that when the speaker was seven, their mother moved them to a new school. This sentence clearly indicates the age of the speaker and who initiated the action, making it the most precise and easy to understand among the choices. Choices A, C, and D are incorrect because they either incorrectly position the age or the action initiator, leading to ambiguity and confusion in the sentence.

Correct Answer: A

Rationale: The word 'iterate' is not spelled correctly in the sentence. The correct word that should be used here is 'itinerant,' which means constantly traveling from place to place, especially for work. In this context, 'iterate' does not fit as it means to repeat a process or utterance. 'Continually' is spelled correctly and means happening without interruption. 'Within' and 'district' are also spelled correctly and are used appropriately in the sentence. Therefore, choice A is the correct answer.

Correct Answer: C

Rationale: In this sentence, 'Three days from now' indicates a future timeframe, so the correct verb tense to use is the future tense. The phrase 'will perform in a show' is the best choice to make the sentence grammatically correct because it aligns with the future action of the horses. Choice A ('performing in a show') uses the present participle and is incorrect in this context. Choice B ('performed in a show') uses the past tense, which is not suitable for a future event. Choice D ('have performed in a show') uses the present perfect tense, which is also not appropriate for a future action. Therefore, the correct answer is C.

Correct Answer: A

Rationale: The word 'oneself' is a reflexive pronoun that refers back to the subject of the sentence, allowing the sentence to be grammatically correct. Options B and C, 'oneselves' and 'hisself,' are not standard English words. Option D, 'themselves,' is a plural pronoun and does not agree with the singular noun 'one' in the sentence.

Correct Answer: A

Rationale: The subject of the sentence 'The hockey team' is singular, so the correct verb to use is 'is' to maintain subject-verb agreement. In this case, 'is' agrees with the singular subject 'team,' making the sentence grammatically correct. Choices B, C, and D are incorrect as they do not agree with the singular subject 'team.' 'Are' is plural, 'be' is not the correct form of the verb to use in this context, and 'were' is past tense which is not suitable for the present tense sentence.