The blue whale is the largest animal _________ the world.

Correct Answer: B

Rationale: The correct answer is 'B: On.' The phrase 'on the world' is incorrect. The preposition 'on' is used to indicate position or location, making it the appropriate choice in this context. Therefore, the correct sentence should read: 'The blue whale is the largest animal on the world.' Choices A, C, and D are incorrect because 'in,' 'of,' and 'at' are not suitable prepositions to describe the blue whale's size in relation to the world.

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: 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 sentence is 'Which one do you want?' Choice A is grammatically correct as it forms a question using 'which' to inquire about a specific choice. Choices B, C, and D contain errors in phrasing or grammar. Choice B includes a misspelling of 'want,' choice C uses 'whose' incorrectly, and choice D incorrectly combines 'who' and 'is' without proper context.

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.