The newly composed songs were sung by them. which revision changes the sentence from the passive voice to the active?

The revision which changes the sentence from the passive voice to the active is the following one:

They sang the newly composed songs.

Explanation:

In passive voice, the verb to sing is in past participle (sung), since it appears right after verb to be (were), indicating a passive action.

In active voice, the verb goes to simple past. The reason for it is that the in the passive voice, verb to be was in simple past as well (were):

passive voice: were sung → active voice: sang

Because the agent in the passive voice is "them" (introduced by the preposition "by", which indicates authorship), the subject or doer of the action in the active voice is "they":

passive voice: object pronoun "them" → active voice: subject pronoun "they"

Plus, there is a complete change in the order of the sentence and its elements when converting from the passive to the active voice:

The newly composed songs were sung by them. (passive voice)

                                         ↓

They sang the newly composed songs. (active voice)

the sample answer on e2020

conflicting values are demonstrated between two different groups in animal farm. first, the farm animals value hard work. this is shown by them working late and working long hours at the request of the pigs. napoleon and the pigs, however, sleep late daily. furthermore, the animals value equality. this differs from the value of napoleon and the other pigs. instead of equality, they value only gaining power and maintaining their own privilege, which is demonstrated by their taking extra milk and sleeping in beds.

choices ? or is this a actual question from yourself ?