when did the company open?与when does the company open?那句话是正确的?

when did the company open?与when does the company open?那句话是正确的? when did the accident happen when did the dinosaurs live? When did the children come? 英语翻译A:When did it become clear to you that the company president was working himself to death?B:I had no idea he was overwhelmed until he quit.Before that,I always thought he was happy.Q：When did the man realize the company president was wo 英语翻译inventor Edwin land and the company he founded,polaroid,did this in the photographic imaging business.during the 1950s,when Land was developing his technology,the photography business was already mature.kodak dominated that business and m When did the earthquake of Wenchuan happen when did the world war break out? When did the accident ( ) ( ) (发生）?填空 when did you take the medicine last when did the Iraqi War break out ? When did they arrive ( ) the airport 翻译 When did the last dinosaurs live? when did you arrive.the museum? When did you_______( 到达)at the airport. when did the Shaghai World Expo begin? when did the play put on when did the story take place?为什么要用did