2、4. Can you make sure ___________?A. that he will come here today B. when he will come here todayC. will he come here today D. whether will he come here today5.Ifshe_____theanswertothisquestion,she_____us.A.knew;toldB.willknow;willtellC.knows;willtellD.knows;tells6.InourEnglishstudy,______isn