Question : Select the option that expresses the given sentence in passive voice.
The Mesopotamians invented the decimal system.
Option 1: The decimal system was invented by the Mesopotamians.
Option 2: The decimal system is invented by the Mesopotamians.
Option 3: The decimal system is an invention of the Mesopotamians.
Option 4: The decimal system has been invented by the Mesopotamians.
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Correct Answer: The decimal system was invented by the Mesopotamians.
Solution : The correct choice is the first option .
Passive voice is the voice in which the object experiences an action rather than the person who performs the action. Hence, the object in the active sentence becomes the subject in the passive voice.
The structure of the passive voice in the case of the simple past tense is: "Singular object + was + past participle form of the verb + 'by' followed by the agent of the action."
Therefore, the sentence in the passive voice is: "The decimal system was invented by the Mesopotamians."
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