如图，在等量异种点电荷形成的电场中，O为两电荷连线的中点，B、D位于该连线上，A、C位于该连线的中垂线上，ABCD构成一正方形。关于A、B、C、D四点的场强大小E和电势的关系，正确的是

按要求完成句子

小题1:He finished his work yesterday.（改为被动语态）

His work ____________  ____________  ______________him yesterday.

小题2:He left his office ten minutes ago.（同义句）

He  _________  _________  _________  __________  his office  _______ten minutes.

小题3:The Internet is used to find information.（划线部分提问）

_______________  ___________the Internet  ________  ________  ___________？

小题4:We’ve already finished reading the book. (改为一般疑问句)

_______________  you _____________  _____________ the book _______________?

小题5:You will spend about an hour on each level. (同义句)

Each level __________  ______________  ___________about an hour.