Answer: A) True
Explanation for this question is being written.
Answer: D) All of the above.
Answer: A) Yes
Answer: A) Making the subject less agentive.
Answer: B) Passive voice, because it allows you to omit the doer of the action.
Answer: B) By Juno.
Answer: B) The form was submitted late.
Answer: A) By
Answer: B) It hides who performs the main action.
Answer: A) TRUE
Answer: B) False
Answer: B) Passive voice.
Answer: D) The action or result.
Answer: B) No
Answer: B) Passive
Answer: C) If the doer of the action is clear.
Answer: A) The agent is not known, or when it's a pronun.
Answer: A) To talk about actions, events and processes when who or what causes the action is not important or is unkown.
Answer: C) By
Answer: A) The teacher in 'The teacher explains the lesson'.
Answer: A) Where
Answer: D) We use an agent in the passive voice when it is necessary to specify the doer of the action.
Answer: C) You don't know the doer.
Answer: D) The chef.
Answer: C) Exclude
Answer: A) The subject.
Answer: D) By
Answer: C) The doer with 'by'.
Answer: B) Complement
Answer: B) By
Answer: C) BY
Answer: B) To avoid blaming anyone directly.
Answer: B) FALSE
Answer: B) Is not always necessary.
Answer: B) Keep the passive voice sentence or supply the agent itself before changing to the active.
Answer: A) The books which were written by Orwell are classics. $\rightarrow$ The books written by Orwell are classics.
Answer: A) To emphasize the action rather than the doer, because the doer is unknown or unimportant in that context.
Answer: B) When the subject is unimportant or unspecified.
Answer: C) It avoids assigning blame or naming the 'doer'.
Answer: A) Not always. When you want to state who performed the action.
Answer: D) The suspect was arrested by the police.
Answer: B) Eliminate or obscure responsibility.