when did the people in Egypt built pyramids

When did people begin to trave along the Silk Road? when did people begin to travel along the silk road when did the people in Egypt built pyramids Why did the people 把下列句子改写成被动语态:when did the people build the bridge? when did the people in Egypt built pyramids用英语回答! when did people begin to travel along the silk roadWhen did people begin to travel along the Silk Road?用英文回答 when did the accident happen when did the dinosaurs live? When did the children come? 1.When did you invent the strange machine 2.Where do people plant the trees (都改为被动语态) When ( ) the People's Republic of China ( A.was,found B.was,founded C.did,found D.does,found 该被动,where do people make trains?还有一句：when did Charlotte Bronte write the book Jane Eyre? around you,you did not care; when you care about,he has been unable to you!Cherish the people around. when are people the smartest? 由主动结构变为被动结构 1.where do people make trains?____________________________ 2.when did charl由主动结构变为被动结构1.where do people make trains?____________________________2.when did charlotte bronte write the book jane ey When did people f____ begin to use stamps? how many people did the young girl