Correct Answer: C

Rationale: The correct answer is 'will be certified' because it correctly indicates the future tense of the action of certifying the students after they pass the exam. This phrase accurately conveys the timing of the certification process in relation to the completion of the exam. Choice A 'being certified' is incorrect as it does not specify the future tense, while choice B 'have been certified' is incorrect as it indicates a past action. Choice D 'are certifying' is incorrect as it suggests the certification is currently happening, which is not the intended meaning in the sentence.

Correct Answer: A

Rationale: The word 'incredible' is used incorrectly in the sentence. The correct form in this context should be 'incredibly' to modify the adjective 'complex.' Therefore, the corrected sentence is, 'The design was incredibly complex, with multicolored, repeating patterns.' The other choices (B, C, D) are used appropriately in the sentence and do not need any corrections.

Correct Answer: D

Rationale: In the given sentence, a semicolon is needed after 'early' to join the two independent clauses 'I finished the project early' and 'however, I really should edit my work.' This punctuation mark helps to connect the related ideas in the sentence while maintaining the separation between the clauses. The other choices are incorrect because an apostrophe is used to show possession or to indicate missing letters; a colon is used to introduce a list, explanation, or quotation; and a comma alone would not provide the necessary separation between the two independent clauses in this context.

Correct Answer: B

Rationale: The correct form to use in this sentence is the present participle 'taking.' The sentence should read, 'Before taking this medicine, consume a modest meal.' It is important to use the present participle form when talking about an action that occurs before another action. Choice A 'having taken' is incorrect as it suggests a completed action before consuming a meal. Choice C 'took' is in the past tense, not suitable for indicating an action that should happen before another. Choice D 'will take' is in the future tense, which does not fit the context of the sentence.

Correct Answer: B

Rationale: The sentence is in past tense ('As the concert ended'). Therefore, the correct verb form to use is 'asked,' as it agrees with the past tense of the sentence. Choice A is incorrect because 'ask' is not in agreement with the past tense context. Choice C is incorrect because 'have asked' is present perfect tense, not past tense. Choice D is incorrect because 'are asking' is present continuous tense, not past tense.