Correct Answer: A

Rationale: The word 'his' in the sentence is referring to Mr. Karnicki's relatives, indicating possession. Therefore, the correct substitution should maintain the possessive form. 'His' is the appropriate possessive pronoun to use in this context, ensuring clarity and coherence in the sentence structure. Choices B, C, and D are incorrect as they do not correctly convey the possessive relationship between Mr. Karnicki and his relatives.

Correct Answer: B

Rationale: The correct answer is B: 'Comma.' In the sentence, a comma is needed to separate the independent clauses 'I will check the supply closet' and 'you can look in the laundry.' This comma helps to indicate a pause between the two related but separate actions that each person is taking. Choice A (Period) is incorrect because a period would create two separate sentences. Choice C (Colon) is incorrect as a colon is used to introduce a list or explanation. Choice D (Semicolon) is incorrect as a semicolon is used to connect two closely related independent clauses without a coordinating conjunction.

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.

Correct Answer: B

Rationale: The word 'more' is the correct choice to make the sentence grammatically correct. 'More' is used to indicate an increase in quantity, which fits well in the sentence structure 'I added more pepper to the casserole.' Choices A, C, and D are incorrect. 'Too' implies an excessive amount, 'those' refers to specific items, and 'many' is used for countable objects, none of which are suitable in this context.

Correct Answer: B

Rationale: The correct word should be 'coarse' instead of 'course' in this context. 'Coarse' means composed of relatively large parts or particles, which is the intended meaning in the sentence as it describes the type of flour used for the meatballs. On the other hand, 'course' means a route or direction taken, which does not fit the context here.