Choose the option that corrects the grammatical error in the sentence: "The amount of time students spend on revision have a direct impact on their examination results."
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Worked Solution
Step 1: The subject is The amount of time students spend on revision — a noun phrase with amount as the head noun.
Step 2: Amount is a singular noun, requiring the singular verb has.
Step 3: The phrase students spend on revision is a relative clause modifying time, not the subject.
Answer: has
Correct answer: has
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