1,An(immense,great)amountofmoneyhasbeenputintobuildingthedamtocontroltheriver.
2.Doctors(contribute,attribute)thefallinthenumberofdeathfromheartdiseasetoimprovementsindiet.
3.Theadsaysthe(minimum,optimum)requirementsforthejobareaBachelordegreeandtwoyears’experience.Youdon’tstandachancewithoutworkingexperience