Rewrite these sentences using the given words: Lan can sing very well

     1.Rewrite these sentences using the given words:
1.Lan can sing very well.She can't play the piano.(Combine these sentence with''although'')
->........................................................................................................................................................
2.We make the air dirty becau we use the car all the time.(Rewrite this sentence with ''If'')
->........................................................................................................................................................
3.The Nile is the longest river in the world.
->No river .........................................................................................................................................
4.In the future,home robots can do all our housework.
->In the future,home robots will ....................................................................................................
5.I've never read a more romatic story.
->It's the ...........................................................................................................................................
6.The doctor says that if my father continuesto smoke he'll be ill.
->The doctor says that unless .......................................................................................................
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