what are they Do you know?合并一句话

Do you know what they are? They are firefighters 改为单数 What do you do ? 回答 do know are they what you连词成句 what ,do ,you ,know ,they,are怎样组 you know what they do are 连词成句!帮个忙 what are they Do you know?合并一句话 What are they doing?Do you think?（合并） do you konw what are they talking about.改错 do you know of any world records?what are they? What are they( )(do)now what are you what do you do? What great scientists do you know?What are they known for?用英文回答。 what are those in English?They are oranges.How do you spell them?的答句 There are many ways t somewhere.Look at these pictures.Do you know what they are? what questions do you think are often asked in an interview?why are they ask? What do you do?How are you? Do you what they should do? What are you do what are you want to do