重写句子：Alan passed the test. Alan had studied hard. Alan had understood the material.(complex sentence)
Alan passed the test because Alan had studied hard and understood the material.
暂无解析
Weareallconcerned_______hersafety.
改写病句：WhiledrivingonBlueberryAvenueyesterdayafternoon,atreefelltowardJack
重写句子：Ihavecheckedmydocumentsseveraltimes.Istillcan’findttheproblem.(compoundsentence)
重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)
Veryfewpeopleunderstoodthiscontract,______wasveryobscure.
