# 1Multiple ChoiceIn the active voice, who performs the action of the verb?The object of the sentenceThe subject of the sentenceThe agent of the sentenceThe preposition of the sentence
# 2Multiple ChoiceWhen we want to emphasize the object of the action, which voice do we use?Active voicePassive voiceImperative voiceInterrogative voice
# 3Multiple ChoiceIn a passive sentence, what is the noun that follows 'by' called?The subjectThe objectThe agentThe verb
# 4Multiple ChoiceIf the agent is unknown or not important, what part of the passive sentence can be omitted?The subjectThe verbThe objectThe 'by' phrase