Rewrite the following sentences in active voice. You may have to add an agent in some cases.
1. French is spoken in many countries.
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2. Putonghua is spoken in China.
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3. Most road accidents are caused by careless drivers and pedestrians.
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4. The meal is being prepared by my sister.
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5. The rich man has been kidnaped recently
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6. This store was opened last Thursday.
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