Change the sentences into passive voice

Cần gấp nha mọi người, sẽ chấm điểm :)
II. Change the sentences into passive voice
1. I learn English every day.
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2. My mother wrote that letter.
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3. He is asking me a lot of questions.
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4. She was doing her homework at that time. 
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5. My mother has made that cake.
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6. They had prepared a dinner before we came.
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7. My friend can answer this question.
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8. Nam has just finished his report.
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9. The students have to wear uniforms every day.
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10. We must use English in the English class.
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