Question

change the following sentences in passive to active
The telegraph wires have been cut.
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Answer 1

ANSWER:

Someone has cut the telegraph wires.

Answer 2

The sentence belongs to the passive voice but lacks the " by agent".We have to use a "by Agent" which will be the subject of the active voice

Let's take "Someone" as "by agent".

Active voice- Someone has cut the telegraph wires.

hope it help u