In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error and the number of that part is your answer . If a sentence is free from errors, your answer is No. error.Question:We have finished our work three hours ago and have been waiting for you since then.

• A. three hours ago and have been waiting
• B. for you since then
• C. No error
• D. we have finished our work