Change into passive voice
Câu 1: A group of students have met their friends at the rail way station.
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Câu 2: This is the second time they have written to us about this.
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Câu 3: Somebody has taken some of my book away.
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Câu 4: A pair of Robins has built a nest in the porch since last week.
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Câu 5: Have they changed the window of the laboratory?
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Câu 6: What time can the boys hand in their paper?
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A.
B.
C.
D.