Why did early men use fire?（保持句意不变） __ did early men use fir

Why did early men use fire?（保持句意不变） __ did early men use fir why did you go home early（改为同意句） some people use fire to burn rubbish 保持句意不变 some people use 英语同义句替换!Why did the workers use live models（）did the workers After early men discovered fire ,they started eating ( ) foo Did he use to get up early?= Used he to get up early?请问这俩句成立 英语翻译In the early nineteenth century,people did not use stamp Why did you get up so early?( Why did early settles come to America? why did Lily get up so early?-------did Lily get up so early why don't you use the underground to work?(保持原意不变) why___ __ why did your sister get up so early this morning (同义句)