Final answer:
The correct completion for the passive sentence is 'Letters are delivered by the postman at 8 every day,' which uses the present simple passive form to indicate a regular action.
Step-by-step explanation:
To complete the sentence with the passive form of the verb in brackets, we need to ensure that the subject is being acted upon by something else. The sentence 'Letters _____________________ by the postman at 8 every day.' indicates a regular action in the present, so the present simple passive form is required. The correct passive form to complete this sentence is 'Letters are delivered by the postman at 8 every day.' Therefore, the correct answer is not directly provided in options A-D, but can be constructed from the context of the sentence.
In passive sentences, we should look for the following:
- The subject is not conducting the action, but is being acted upon.
- A form of the 'be' verb (am, is, are, was, were) appears with the past participle (-ed or –en) form of the verb.
- The preposition 'by [noun phrase]' either appears in the sentence or can be added.