An experiment was being studied by Dr. Joyce in his laboratory.
An experiment was being studied by Dr. Joyce in his laboratory.
An experiment is being studied by Dr. Joyce in his laboratory.
An experiment is being studied by Dr. Joyce in his laboratory.
An experiment has been studied by Dr. Joyce in his laboratory.
An experiment has been studied by Dr. Joyce in his laboratory.
An experiment is studied by Dr. Joyce in his laboratory.
An experiment is studied by Dr. Joyce in his laboratory.
Correct Answer:
An experiment is being studied by Dr. Joyce in his laboratory.
An experiment is being studied by Dr. Joyce in his laboratory.