重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)
Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
JeansaresohotthesedaysthatbignamestarsappearonTVadvertisingfortheir______brands.
Howmanypartsisanarticleusuallycomposedof?Whatarethey?
ORS溶液不宜用于（）
