Identify the errors in the given sentence and choose the sentence that rectifies these errors.
My idea can be key idea for cracking difficult conflicts of extremely high level.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1, i.e.:“My idea can be a key idea for cracking difficult conflicts of an extremely high level.”
The original sentence has two errors in article usage:
“key idea” needs an indefinite article “a” because it’s a singular noun phrase being introduced for the first time.
“extremely high level” also refers to a non-specific singular noun phrase, so it should be “an extremely high level.” The article “an” is used before vowel sounds ([IELTS® Writing: Grammar Rules – Definite and Indefinite Articles] turn0search6).
Option 1 corrects both errors:
My idea can be a key idea for cracking difficult conflicts of an extremely high level.
This version is grammatically sound and clearly conveys the intended meaning.