What is the meaning of the prefix 'pre-'?

Correct Answer: B

Rationale: The correct answer is B: 'Before.' The prefix 'pre-' means 'before,' indicating something that comes before the main action or event. For example, in words like 'preview' or 'predict,' the prefix 'pre-' implies anticipation or happening before the complete action. Choices A, C, and D are incorrect. 'After' (Choice A) is the opposite of 'before,' 'During' (Choice C) implies something happening at the same time, not before, and 'Against' (Choice D) indicates opposition, which is unrelated to the prefix 'pre-.' Therefore, the answer is 'Before.'

Correct Answer: C

Rationale: The main clause is the independent clause that can stand alone as a complete sentence. In this sentence, 'She finished her work on time' is the main clause because it expresses a complete thought independently. Choices A and B are subordinate clauses as they cannot stand alone as complete sentences. Choice D lacks the subject 'she,' making it incomplete and not a main clause.

Correct Answer: B

Rationale: The correct usage of 'affect' in a sentence is as a verb meaning to influence something, as in 'The weather will affect our plans.' Choice A is incorrect because 'affect' should be 'effect,' which is a noun representing the result of an action. Choice C is incorrect as 'affect' should be 'effect' to describe a disorder. Choice D is incorrect because 'affect' should be 'effect' to convey the result of the news.

Correct Answer: C

Rationale: The prefix 'intra-' means 'within,' so 'intravenous' refers to something within veins. Choice A, 'Across veins,' is incorrect as 'intra-' does not indicate movement across but within. Choice B, 'Between veins,' is incorrect because 'intra-' does not imply a relationship between two separate veins. Choice D, 'Outside veins,' is incorrect as 'intra-' signifies something inside or within, not outside.

Correct Answer: A

Rationale: Choice A is the correct answer as the sentence is correctly punctuated using em dashes to set off the list. The em dashes help to clearly separate the list of tools from the rest of the sentence. In Choice B, a colon is used, which is incorrect as colons are typically used to introduce a list, not within the list itself. Choice C lacks any punctuation to separate the list, making it unclear and incorrect. Choice D uses semicolons, which are not appropriate for separating items in a list, making it incorrect as well.