C. GRAMMAR
Turn the sentences into the passive voice:
1. Parents shouldn't keep their children at home all the time.
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2. No one can treat girls unequally.
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3. The government should give more girls the opportunity to have a better life.
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4. They have to tidy up the room after the lesson.
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5. My best friend can do these exercises very quickly.
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6. They must show their identity cards when they enter the park.