Question

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Answer (Detailed Solution Below)

Option 1 : since three years

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Detailed Solution

सही उत्तर since three years है।

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PrepSnapprepsnap.in • Part -A

Question:

She has been working on this algorithm since three years.

1.
since three years
2.
She has been working
3.
on this algorithm
4.
No error

Correct Answer: since three years

With a period of duration like "three years", the preposition "for" is used, not "since". It should read "for three years".

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