Common Error Detection
Find out whether there is any grammatical error in below sentence.What does Professor Dhavan / spend so many hours / in the laboratory?

in the laboratory?
spend so many hours
What does Professor Dhavan
No error

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Common Error Detection
Find out whether there is any grammatical error in below sentence. Even after worked in the office / for as many as fifteen years, / he still does not understand / the basic objectives of the work.

No error
Even after worked in the office
the basic objectives of the work
for as many as fifteen years,
he still does not understand

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