Thomas Edison invented the light bulbs 怎样改成被动语态

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• Thomas Edison invented the light bulbs 怎样改成被动语态
• 将下列句子改为被动语态（英语）将下列句子改为被动语态：1.We found some jewels in a box.2.Thomas Edison invented the light bulb.3.People use stamps for sending letters.4.Farmers grow rice in the Sonth of China.5.He gave me a new dictionary this morning.6.The boy didn't throw the stone just now.7.He doesn't operate this machine.
• The meeting begins（ at two o'clock in the afternoon）.针对括号部分提问 （）（）（）the meeting ()?
• 3.The light culb was invented by Thomas edison.对最后两个词提问--the light bulb-by?