重写句子：Alanpassedthetest.Alanhadstudiedhard.Alanhadunderstoodthematerial.(complexsentence)
Alan passed the test because Alan had studied hard and understood the material.
暂无解析
改写病句：WhiledrivingonBlueberryAvenueyesterdayafternoon,atreefelltowardJack
Veryfewpeopleunderstoodthiscontract,______wasveryobscure.
Itmakesgood________tobringanumbrella;itseemstoberainingtoday.
重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)
改写病句：Shakespearewrotecomedies,tragedies,romances,andtheplayswhichwerebasedonhistoricalevents.
