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:Whenwearerelievedofworkingpressuresoftheoffice,wecanenjoyhappinessandrelaxationathome.(modifyingphrase)
Ifyou_______inbehavinginthiswayyouwillbringyourselfnothingbuttrouble.