Select the correct active/passive form of the given sentence. **They have completed the project successfully.**
Options:
- A: The project is being completed successfully by them.
- B: The project was completed successfully by them.
- C: The project has completed successfully by them.
- D: The project has been completed successfully by them.
Related Practice Questions:
- A sum of ₹4000 is invested at compound interest for 2 years at a rate of 10% per annum. What will be the total amount at the end of 2 years?
- At what rate of simple interest per annum will a sum of money double itself in 8 years?
- The difference between the compound interest and simple interest on a certain sum of money for 2 years at 5% per annum is ₹25. Find the sum.
- The study of living organism :
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