Choose the correct one.
Correct answer: A. If fertility declines fast enough the line will level off sometime after the middle of the twenty-first century.
- A. If fertility declines fast enough the line will level off sometime after the middle of the twenty-first century.
- B. If fertility declines enough fast the line will level off sometime after the middle of the twenty-first century.
- C. If fertility declines fast enough the line will level off sometimes after the middle of the twenty-first century.
- D. If fertility decline fast enough the line will level off sometime after the middle of the twenty-first century.
Explanation
The correct answer is A. If fertility declines fast enough the line will level off sometime after the middle of the twenty-first century.- The sentence is structured correctly, with a conditional clause ("If fertility declines fast enough") followed by a main clause ("the line will level off...").- The adverb "fast enough" is correctly placed to modify the verb "declines".- The verb tense is consistent, with "declines" and "will level off" both in the future tense.
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About Adverbs and Their Position
Adverbs modify verbs, adjectives, other adverbs or whole clauses to express manner, time, place, frequency, degree and viewpoint. The topic covers position rules for different adverb types, especially mid-position frequency adverbs, and how placement can change emphasis or create an unclear meaning.
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