Some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and corresponding to the appropriate correction option. If a sentence is free from error, corresponding to 'No error' option.
We have finished our work three hours ago and have been waiting for you since then

• three hours ago and have been waiting

• we have finished our work

• for you since, then

• No error

Some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and corresponding to the appropriate correction option. If a sentence is free from error, corresponding to 'No error' option.
Several guests noticed Mr Sharma falling back in his chair and gasping for breath.

• falling back in his chair

• Several guests noticed Mr. Sharma

• and gasping for breath

• No error

Some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and corresponding to the appropriate correction option. If a sentence is free from error, corresponding to 'No error' option.
Many a man want to be rich quickly

• want to be

• Many a man

• rich quickly

• No error

Some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and corresponding to the appropriate correction option. If a sentence is free from error, corresponding to 'No error' option.
A study is going underway to determine the exact concentration of lead in the water supply.

• to determine the exact concentration

• A study is going underway

• of lead in the water supply

• No error

Some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and corresponding to the appropriate correction option. If a sentence is free from error, corresponding to 'No error' option.
The Russian ambassador's whereabouts is not known to anyone

• whereabout is

• not known to anyone

• The Russian ambassador's

• No error