1.When did you invent the strange machine 2.Where do people plant_英语解答

1.When did you invent the strange machine 2.Where do people plant the trees (都改为被动语态)

人气：494 ℃　时间：2020-01-10 12:58:29

解答

When was the strange machine invented by you?
Where are the trees planted?(我认为本句应该用一般过去时态,也就是are改成were)