Câu bị động
1. We sell tickets for all films at the box office. (Tickets for all films/sell/at the box office)
Tickets for all films are sold at the box office.
2. Thomas Edison invented the electric light bulb. (The electric light bulb/invent/by Thomas Edison)
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3. Someone painted the house last month. (The house/paint/last month)
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4. Several people saw the cowboy. (The cowboy/see/by several people)
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5. Where do they make these cars? (Where/these cars/make)
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6. Seven nations signed the agreement. (The agreement/sign/by seven nations)
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7. A stranger helped me. (I/help/by a stranger)
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8. They don't deliver milk on Sundays. (Milk/not/deliver/on Sundays)
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