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.I had hoped to have met him yesterday / to discuss the matter with him / but he was not in his house, and so I could not meet him.

No error
to discuss the matter with him
I had hoped to have met him yesterday
but he was not in his house, and so I could not meet him

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