Final answer:
The correct past perfect continuous tense in active and passive voice is 'Had been writing' for active and 'Was being written' for passive. The subject performs the action in active voice and is acted upon in passive voice.
Step-by-step explanation:
To understand the past perfect continuous tense in both active and passive voice, it's important to recognize the structure of each. In the active voice, the subject performs the action, while in the passive voice, the subject is acted upon. Here is the correct match for the past perfect continuous tense in both active and passive voice examples:
A) Had been writing - Was being written
Active Voice Example: They had been writing the test for two hours when the bell rang.
Passive Voice Example: The test was being written by them for two hours when the bell rang.
The structure of the passive voice often includes a form of the verb 'to be' along with the past participle of the main verb and, frequently, can include the preposition 'by'.