Correct Answer: A

Rationale: The correct answer is 'Is.' In this sentence, the subject 'picking up groceries' is singular, so it should be followed by the singular form of the verb 'to be,' which is 'is.' The verb should agree with the subject in number. 'Am' is incorrect as it is the first person singular form, 'Is it' creates an unnecessary question structure, and 'Are' is plural, not matching the singular subject. Therefore, 'Is' is needed to make the sentence grammatically correct.

Correct Answer: B

Rationale: The word 'hear' is misspelled; it should be 'here.' In the context of the sentence provided, 'hear' does not fit logically and should be replaced with 'here' to convey the intended meaning. 'Climate,' 'inappropriate,' and 'skiing' are all spelled correctly and are appropriate in the context of the sentence. 'Hear' is a homophone and does not make sense in this context.

Correct Answer: B

Rationale: 'Presents' is the correct choice here. The sentence requires a verb that indicates the condition appearing with a symptom. In medical terminology, when a condition 'presents' with a symptom, it means that the symptom is a noticeable feature or indication of the condition. Therefore, 'presents' is the appropriate verb to describe how the condition manifests itself with vertigo. The other options do not fit the grammatical structure of the sentence.

Correct Answer: C

Rationale: The correct word is 'too,' which indicates an excessive amount. In this sentence, 'too high' describes the fever being excessively high, making it difficult for the child to lie comfortably. The other options do not fit the context: 'to' is a preposition, 'much' describes quantity but not excessiveness, and 'more' indicates a comparison, which is not relevant here.

Correct Answer: A

Rationale: The correct answer is 'him or her' because it agrees with the singular noun 'child.' When referring to a singular subject of unknown gender, 'him or her' is a suitable pronoun choice to maintain grammatical correctness. Options B, C, and D are incorrect as they do not match the singular form of 'child.' Using 'them' (B) would be plural, 'it' (C) is not appropriate for a person, and 'she or he' (D) is unnecessarily wordy and less commonly used in modern English.