Correct Answer: A

Rationale: The correct answer is 'amount.' In this context, 'amount' is used to describe the intensity or level of pain, which is an uncountable noun. 'Frequency' (B) refers to how often something occurs, 'number' (C) is used for countable objects, and 'amplitude' (D) is typically used in the context of sound or waves, not pain.

Correct Answer: A

Rationale: In this sentence, the correct choice is 'swam,' which is the past tense of 'swim.' Therefore, 'swam' correctly completes the sentence: 'Theo was in great shape; he swam all the way back to the pier.' 'Swimmed' is not a valid past tense form of 'swim,' 'swum' is the past participle form and doesn't fit the context, and 'swim' is the base form of the verb and is not suitable in this case.

Correct Answer: A

Rationale: In the sentence, 'She asked ____ to take her around the corner to the drugstore,' the correct word to fill in the blank is 'him.' The pronoun 'him' is in the objective case and is used correctly as the object of the verb 'asked.' The other options ('his,' 'he,' and 'his'') are either possessive or nominative cases, which do not fit the grammatical structure needed here. 'His' is possessive, 'he' is nominative, and 'his'' is incorrect due to the unnecessary apostrophe.

Correct Answer: B

Rationale: In this context, 'good' is the appropriate word to describe Sharon's feelings about her speech. 'Good' is used to express a positive sentiment which fits well with how one would feel about the outcome of a speech. 'Well' typically refers to the state of health or being done in a good way, not emotions. 'Finely' refers to something done very carefully or skillfully, not an emotional state. 'Happily' denotes a feeling of joy or pleasure, which may not be the most suitable term for describing her feelings about the speech outcome.

Correct Answer: D

Rationale: The sentence is in the past tense, indicating that the action occurred before the present moment. 'Began' is the correct past tense form of the verb 'begin' in this context. It shows that Stan started reviewing his class notes in the past. Choice A ('begins') is incorrect as it represents present tense. Choice B ('begun') is incorrect as it is the past participle form and does not fit the sentence structure. Choice C ('begin') is incorrect as it is the base form of the verb and not appropriate for the past tense context of the sentence.