重写句子：Fossil fuels are non-renewable. We need to find alternative energy sources. (compound sentence)
Fossil fuels are non-renewable, so we need to find alternative energy sources.
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重写句子：Alanpassedthetest.Alanhadstudiedhard.Alanhadunderstoodthematerial.(complexsentence)
重写句子：We slipped on the road when we could see no lights in the heavy rain that night.(periodic sentence)
重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)
重写句子：Theteacherreturnedthehomework.Theteachernoticedtheerror.(complexsentence)
重写句子：Attheinternationalmuseum,youcanfindancientEgyptianart.YoucanexploreAfricanartifactsthere.Youcandiscoverbeautifultextilesfromaroundtheworldthere.(parallelstructure)
