Exercise 3: Put these sentences into the passive form (Interrogative form).
1. Do they teach English here?
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2. Will you invite her to your wedding party?
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3. Has Tom finished the work?
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4. Did the teacher give some exercises?
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5. Have they changed the window of the laboratory?
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6. What books are people reading this year?
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7. How did the police find the lost man?
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8. Who took after the children when you’re away on business?
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9. How long have they waited for the doctor?
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10. What time can the students hand in their papers?
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