In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select 'no improvement'. I (had been) a unique case of slow learning.?

Option 4 : no improvement

The correct answer is- 'No improvement'

• There is no improvement is required in the given sentence in the question.
• In the first option, we know that 'has' never be used with 'I', we use 'have' with it.
• In the second option, 'am' is a helping verb of continuous tense so that need to put V₁+ing after it.
• In the third option, 'had' is a helping verb of the perfect tense so that need to put V₃ after it.
• Clearly, we can say there is no need for improvement in this sentence.

The correct sentence is- I had been a unique case of slow learning.