Question

This test . . . by them yesterday at 2 o'clock. 1 was written 2 is being written 3 was being written ( Passive Voice )

Answer 1

3. Was being written

На прошлое указывает "was", а на продолжительное действие "being".

Answer 2

The correct option is:

3. was being written (Passive Voice)

The complete sentence would be:

"This test was being written by them yesterday at 2 o'clock."