4、sohe___Torontofortwotears.A.hasbeentoB.hasgonetoC.hasbeeninD.hasgone4.Both his parents look sad. Maybethey ______what’s happened to him .A. knewB. have knownC.must knowD.will know5.HaveyoumetMr.Li______?A.justB.agoC.beforeD.amomentago1.Theyhavebeenheresince2000.(对划线部