重写句子：Theteacherreturnedthehomework.Theteachernoticedtheerror.(complexsentence)

Hewasvery_____togo，buthehadnochoice.

Thenewdiscovery_______beofgreatservicetomankind.

重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)

句子写作：Youalwaysremainavictim