把下列句子变成被动词态。
1. Do they teach Japanese in their school?
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2. We heard her sing in the room.
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3. Will they eat a special dinner at the restaurant?
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4. He hasn't finished his homework yet.
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5. He gave me a very nice present for my birthday.
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6. Can we make jiaozi at school?
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7. Must we finish the work now?
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8. Linda looks after the kid at home.
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9. He found nobody in.
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l0. They saw a lot of students playing basketball on the playground.
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